From e643a3501faf045853c65930da2df19061b6bb6c Mon Sep 17 00:00:00 2001
From: miriamjorna <hoimirextra@gmail.com>
Date: Fri, 3 Jul 2026 20:26:36 +0100
Subject: [PATCH 1/8] Number systems tests

---
 number-systems/Part-1.md | 32 ++++++++++++++++----------------
 number-systems/Part-2.md | 10 +++++-----
 2 files changed, 21 insertions(+), 21 deletions(-)

diff --git a/number-systems/Part-1.md b/number-systems/Part-1.md
index d8f9c290e..531bee66f 100644
--- a/number-systems/Part-1.md
+++ b/number-systems/Part-1.md
@@ -7,48 +7,48 @@ The goal of these exercises is for you to gain an intuition for binary numbers.
 The answers to these questions should be a number, either in binary, hex, or decimal.
 
 Q1: Convert the decimal number 14 to binary.
-Answer:
+Answer: 1110
 
 Q2: Convert the binary number 101101 to decimal:
-Answer:
+Answer: 45
 
 Q3: Which is larger: 1000 or 0111?
-Answer:
+Answer: 1000
 
 Q4: Which is larger: 00100 or 01011?
-Answer:
+Answer: 01011
 
 Q5: What is 10101 + 01010?
-Answer:
+Answer: 31
 
 Q6: What is 10001 + 10001?
-Answer:
+Answer: 34
 
 Q7: What's the largest number you can store with 4 bits, if you want to be able to represent the number 0?
-Answer:
+Answer: 15
 
 Q8: How many bits would you need in order to store the numbers between 0 and 255 inclusive?
-Answer:
+Answer: 8
 
 Q9: How many bits would you need in order to store the numbers between 0 and 3 inclusive?
-Answer:
+Answer: 2
 
 Q10: How many bits would you need in order to store the numbers between 0 and 1000 inclusive?
-Answer:
+Answer: 10
 
 Q11: Convert the decimal number 14 to hex.
-Answer:
- 
+Answer: E
+
 Q12: Convert the decimal number 386 to hex.
-Answer:
+Answer: 182
 
 Q13: Convert the hex number 386 to decimal.
-Answer:
+Answer: 902
 
 Q14: Convert the hex number B to decimal.
-Answer:
+Answer: 11
 
 Q15: If reading the byte 0x21 as a number, what decimal number would it mean?
-Answer:
+Answer: 33
 
 Q16: Continues in Part-2
diff --git a/number-systems/Part-2.md b/number-systems/Part-2.md
index 68b0933d9..6328076ee 100644
--- a/number-systems/Part-2.md
+++ b/number-systems/Part-2.md
@@ -7,16 +7,16 @@ The goal of these exercises is for you to gain an intuition for binary numbers.
 The answers to these questions will require a bit of explanation, not just a simple answer.
 
 Q16: How can you test if a binary number is a power of two (e.g. 1, 2, 4, 8, 16, ...)?
-Answer:
+Answer: there is exactly one bit set to 1
 
 Q17: If reading the byte 0x21 as an ASCII character, what character would it mean?
-Answer:
+Answer: !
 
 Q18: If reading the byte 0x21 as a greyscale colour, as described in "Approaches for Representing Colors and Images", what colour would it mean?
-Answer:
+Answer: A very dark grey with almost 1/4 of the white that the given dark grey colour contains
 
 Q19: If reading the bytes 0xAA00FF as a sequence of three one-byte decimal numbers, what decimal numbers would they be?
-Answer:
+Answer: 0170 0000 0255
 
 Q20: If reading the bytes 0xAA00FF as an RGB colour, as described in "Approaches for Representing Colors and Images", what colour would it mean?
-Answer:
+Answer: (electric) purple

From 2e049287c6119ee9b264344c0250ad24376980f8 Mon Sep 17 00:00:00 2001
From: miriamjorna <hoimirextra@gmail.com>
Date: Mon, 27 Jul 2026 22:55:42 +0100
Subject: [PATCH 2/8] 1st exercise: ls

---
 individual-shell-tools/ls/script-01.sh | 1 +
 individual-shell-tools/ls/script-02.sh | 1 +
 individual-shell-tools/ls/script-03.sh | 1 +
 individual-shell-tools/ls/script-04.sh | 3 ++-
 4 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/individual-shell-tools/ls/script-01.sh b/individual-shell-tools/ls/script-01.sh
index 241b62f5e..c9cd189b5 100755
--- a/individual-shell-tools/ls/script-01.sh
+++ b/individual-shell-tools/ls/script-01.sh
@@ -13,3 +13,4 @@ fi
 
 # TODO: Write a command to list the files and folders in this directory.
 # The output should be a list of names including child-directory, script-01.sh, script-02.sh, and more.
+ls
diff --git a/individual-shell-tools/ls/script-02.sh b/individual-shell-tools/ls/script-02.sh
index d0a5a10f4..ba3833aaf 100755
--- a/individual-shell-tools/ls/script-02.sh
+++ b/individual-shell-tools/ls/script-02.sh
@@ -4,3 +4,4 @@ set -euo pipefail
 
 # TODO: Write a command which lists all of the files in the directory named child-directory.
 # The output should be a list of names: helper-1.txt, helper-2.txt, helper-3.txt.
+ls ./child-directory/ 
diff --git a/individual-shell-tools/ls/script-03.sh b/individual-shell-tools/ls/script-03.sh
index 781216d21..5161171ec 100755
--- a/individual-shell-tools/ls/script-03.sh
+++ b/individual-shell-tools/ls/script-03.sh
@@ -5,3 +5,4 @@ set -euo pipefail
 # TODO: Write a command which _recursively_ lists all of the files and folders in this directory _and_ all of the files inside those folders.
 # The output should be a list of names including: child-directory, script-01.sh, helper-1.txt (and more).
 # The formatting of the output doesn't matter.
+ls -R
diff --git a/individual-shell-tools/ls/script-04.sh b/individual-shell-tools/ls/script-04.sh
index 72f3817b3..735f5eb4a 100755
--- a/individual-shell-tools/ls/script-04.sh
+++ b/individual-shell-tools/ls/script-04.sh
@@ -15,9 +15,10 @@ echo "First exercise (sorted newest to oldest):"
 
 # TODO: Write a command which lists the files in the child-directory directory, one per line, sorted so that the most recently modified file is first.
 # The output should be a list of names in this order, one per line: helper-3.txt, helper-1.txt, helper-2.txt.
-
+ls -t1 ./child-directory/
 
 echo "Second exercise (sorted oldest to newest):"
 
 # TODO: Write a command which does the same as above, but sorted in the opposite order (oldest first).
 # The output should be a list of names in this order, one per line: helper-2.txt, helper-1.txt, helper-3.txt.
+ls -t1r ./child-directory/

From 6209b448dfe64a0299a5298ee807c76512d0d389 Mon Sep 17 00:00:00 2001
From: miriamjorna <hoimirextra@gmail.com>
Date: Tue, 28 Jul 2026 00:17:00 +0100
Subject: [PATCH 3/8] Sprint 1 IndShellTools cat

---
 individual-shell-tools/cat/script-01.sh         | 1 +
 individual-shell-tools/cat/script-02.sh         | 1 +
 individual-shell-tools/cat/script-03.sh         | 1 +
 individual-shell-tools/cat/script-04-stretch.sh | 1 +
 4 files changed, 4 insertions(+)

diff --git a/individual-shell-tools/cat/script-01.sh b/individual-shell-tools/cat/script-01.sh
index c85053e0f..edcc54fb4 100755
--- a/individual-shell-tools/cat/script-01.sh
+++ b/individual-shell-tools/cat/script-01.sh
@@ -4,3 +4,4 @@ set -euo pipefail
 
 # TODO: Write a command to output the contents of the helper-1.txt file inside the helper-files directory to the terminal.
 # The output of this command should be "Once upon a time...".
+cat ../helper-files/helper-1.txt
diff --git a/individual-shell-tools/cat/script-02.sh b/individual-shell-tools/cat/script-02.sh
index 01bbd5eab..546f90181 100755
--- a/individual-shell-tools/cat/script-02.sh
+++ b/individual-shell-tools/cat/script-02.sh
@@ -11,3 +11,4 @@ set -euo pipefail
 # It looked delicious.
 # I was tempted to take a bite of it.
 # But this seemed like a bad idea...
+cat ../helper-files/helper-1.txt ../helper-files/helper-2.txt ../helper-files/helper-3.txt
diff --git a/individual-shell-tools/cat/script-03.sh b/individual-shell-tools/cat/script-03.sh
index 37573b0c1..dd6b1d8b1 100755
--- a/individual-shell-tools/cat/script-03.sh
+++ b/individual-shell-tools/cat/script-03.sh
@@ -9,3 +9,4 @@ set -euo pipefail
 # 1 It looked delicious.
 # 2 I was tempted to take a bite of it.
 # 3 But this seemed like a bad idea...
+cat -n ../helper-files/helper-3.txt
diff --git a/individual-shell-tools/cat/script-04-stretch.sh b/individual-shell-tools/cat/script-04-stretch.sh
index 00fe3c48b..73a709460 100755
--- a/individual-shell-tools/cat/script-04-stretch.sh
+++ b/individual-shell-tools/cat/script-04-stretch.sh
@@ -13,3 +13,4 @@ set -euo pipefail
 # 3 It looked delicious.
 # 4 I was tempted to take a bite of it.
 # 5 But this seemed like a bad idea...
+cat ../helper-files/helper-1.txt ../helper-files/helper-2.txt ../helper-files/helper-3.txt | cat -n

From bdc698b3bc845eaba570d8411f2942ceaa572f43 Mon Sep 17 00:00:00 2001
From: miriamjorna <hoimirextra@gmail.com>
Date: Tue, 28 Jul 2026 00:24:13 +0100
Subject: [PATCH 4/8] Sprint1 IndShellTools wc

---
 individual-shell-tools/wc/script-01.sh | 1 +
 individual-shell-tools/wc/script-02.sh | 1 +
 individual-shell-tools/wc/script-03.sh | 1 +
 3 files changed, 3 insertions(+)

diff --git a/individual-shell-tools/wc/script-01.sh b/individual-shell-tools/wc/script-01.sh
index c9dd6e5df..c944eeafe 100755
--- a/individual-shell-tools/wc/script-01.sh
+++ b/individual-shell-tools/wc/script-01.sh
@@ -4,3 +4,4 @@ set -euo pipefail
 
 # TODO: Write a command to output the number of words in the file helper-files/helper-3.txt.
 # The output should include the number 19. The output should not include the number 92.
+wc -w ../helper-files/helper-3.txt
diff --git a/individual-shell-tools/wc/script-02.sh b/individual-shell-tools/wc/script-02.sh
index 8feeb1a62..16e530918 100755
--- a/individual-shell-tools/wc/script-02.sh
+++ b/individual-shell-tools/wc/script-02.sh
@@ -4,3 +4,4 @@ set -euo pipefail
 
 # TODO: Write a command to output the number of lines in the file helper-files/helper-3.txt.
 # The output should include the number 3. The output should not include the number 19.
+wc -l ../helper-files/helper-3.txt
diff --git a/individual-shell-tools/wc/script-03.sh b/individual-shell-tools/wc/script-03.sh
index 6b2e9d3d1..b88790d83 100755
--- a/individual-shell-tools/wc/script-03.sh
+++ b/individual-shell-tools/wc/script-03.sh
@@ -8,3 +8,4 @@ set -euo pipefail
 #        1       7      39 ../helper-files/helper-2.txt
 #        3      19      92 ../helper-files/helper-3.txt
 #        5      30     151 total
+wc ../helper-files/helper-1.txt ../helper-files/helper-2.txt ../helper-files/helper-3.txt

From 45cc2c6b14e9741a7f556aa9c0d7fdfedc7ef846 Mon Sep 17 00:00:00 2001
From: miriamjorna <hoimirextra@gmail.com>
Date: Tue, 28 Jul 2026 01:03:35 +0100
Subject: [PATCH 5/8] Sprint1 IndShellTools grep

---
 individual-shell-tools/grep/script-01.sh | 1 +
 individual-shell-tools/grep/script-02.sh | 1 +
 individual-shell-tools/grep/script-03.sh | 1 +
 individual-shell-tools/grep/script-04.sh | 1 +
 individual-shell-tools/grep/script-05.sh | 1 +
 individual-shell-tools/grep/script-06.sh | 1 +
 individual-shell-tools/grep/script-07.sh | 1 +
 7 files changed, 7 insertions(+)

diff --git a/individual-shell-tools/grep/script-01.sh b/individual-shell-tools/grep/script-01.sh
index fb05f42f2..c0dc857f2 100755
--- a/individual-shell-tools/grep/script-01.sh
+++ b/individual-shell-tools/grep/script-01.sh
@@ -4,3 +4,4 @@ set -euo pipefail
 
 # TODO: Write a command to output every line in dialogue.txt said by the Doctor.
 # The output should contain 6 lines.
+grep "^Doctor" dialogue.txt 
diff --git a/individual-shell-tools/grep/script-02.sh b/individual-shell-tools/grep/script-02.sh
index df6f85640..73b818bdd 100755
--- a/individual-shell-tools/grep/script-02.sh
+++ b/individual-shell-tools/grep/script-02.sh
@@ -4,3 +4,4 @@ set -euo pipefail
 
 # TODO: Write a command to output every line in dialogue.txt that contains the word Doctor (regardless of case).
 # The output should contain 9 lines.
+grep -i "Doctor" dialogue.txt 
diff --git a/individual-shell-tools/grep/script-03.sh b/individual-shell-tools/grep/script-03.sh
index 5383fe578..853a65435 100755
--- a/individual-shell-tools/grep/script-03.sh
+++ b/individual-shell-tools/grep/script-03.sh
@@ -4,3 +4,4 @@ set -euo pipefail
 
 # TODO: Write a command to output the number of lines in dialogue.txt that contain the word Doctor (regardless of case).
 # The output should be exactly the number 9.
+grep -ci "Doctor" dialogue.txt 
diff --git a/individual-shell-tools/grep/script-04.sh b/individual-shell-tools/grep/script-04.sh
index 80ee04776..51b2b0d83 100755
--- a/individual-shell-tools/grep/script-04.sh
+++ b/individual-shell-tools/grep/script-04.sh
@@ -4,3 +4,4 @@ set -euo pipefail
 
 # TODO: Write a command to output every line in dialogue.txt that does not contain the word "Hello" (regardless of case).
 # The output should contain 10 lines.
+grep -iv "Hello" dialogue.txt 
diff --git a/individual-shell-tools/grep/script-05.sh b/individual-shell-tools/grep/script-05.sh
index 1eb538185..984aeb1ff 100755
--- a/individual-shell-tools/grep/script-05.sh
+++ b/individual-shell-tools/grep/script-05.sh
@@ -4,3 +4,4 @@ set -euo pipefail
 
 # TODO: Write a command to output every line in dialogue.txt that contains the string "cure", as well as the line before that line.
 # The output should contain two pairs of two lines of text (with a separator between them).
+grep -B 1 "cure" dialogue.txt 
diff --git a/individual-shell-tools/grep/script-06.sh b/individual-shell-tools/grep/script-06.sh
index 5670e3b6c..990cd7f52 100755
--- a/individual-shell-tools/grep/script-06.sh
+++ b/individual-shell-tools/grep/script-06.sh
@@ -4,3 +4,4 @@ set -euo pipefail
 
 # TODO: Write a command to output the name of every `.txt` file in this directory which contains a line of dialogue said by the Doctor.
 # The output should contain two filenames.
+grep -l "^Doctor:" *.txt 
diff --git a/individual-shell-tools/grep/script-07.sh b/individual-shell-tools/grep/script-07.sh
index 9670ebad9..50c98e31a 100755
--- a/individual-shell-tools/grep/script-07.sh
+++ b/individual-shell-tools/grep/script-07.sh
@@ -4,3 +4,4 @@ set -euo pipefail
 
 # TODO: Write a command to output, for each `.txt` file in this directory, how many lines of dialogue the Doctor has.
 # The output should show that dialogue.txt contains 6 lines, dialogue-2.txt contains 2, and dialogue-3.txt contains 0.
+grep -c "^Doctor:" *.txt 

From 966ef737c301a43db34bdcd24fbb18406c9137b4 Mon Sep 17 00:00:00 2001
From: miriamjorna <hoimirextra@gmail.com>
Date: Tue, 28 Jul 2026 23:56:18 +0100
Subject: [PATCH 6/8] Spr1 IndShellTools sed

---
 individual-shell-tools/sed/script-01.sh | 1 +
 individual-shell-tools/sed/script-02.sh | 1 +
 individual-shell-tools/sed/script-03.sh | 1 +
 individual-shell-tools/sed/script-04.sh | 1 +
 individual-shell-tools/sed/script-05.sh | 1 +
 individual-shell-tools/sed/script-06.sh | 1 +
 6 files changed, 6 insertions(+)

diff --git a/individual-shell-tools/sed/script-01.sh b/individual-shell-tools/sed/script-01.sh
index d592970fc..3eaa573af 100755
--- a/individual-shell-tools/sed/script-01.sh
+++ b/individual-shell-tools/sed/script-01.sh
@@ -5,3 +5,4 @@ set -euo pipefail
 # TODO: Write a command to output input.txt with all occurrences of the letter `i` replaced with `I`.
 # The output should contain 11 lines.
 # The first line of the output should be: "ThIs Is a sample fIle for experImentIng wIth sed.".
+sed "s/i/I/g" ./input.txt
diff --git a/individual-shell-tools/sed/script-02.sh b/individual-shell-tools/sed/script-02.sh
index abdd64d06..94217ba80 100755
--- a/individual-shell-tools/sed/script-02.sh
+++ b/individual-shell-tools/sed/script-02.sh
@@ -5,3 +5,4 @@ set -euo pipefail
 # TODO: Write a command to output input.txt with numbers removed.
 # The output should contain 11 lines.
 # Line 6 of the output should be " Alisha".
+sed "s/[0-9]//g" input.txt
diff --git a/individual-shell-tools/sed/script-03.sh b/individual-shell-tools/sed/script-03.sh
index dd284a296..64fd59608 100755
--- a/individual-shell-tools/sed/script-03.sh
+++ b/individual-shell-tools/sed/script-03.sh
@@ -4,3 +4,4 @@ set -euo pipefail
 
 # TODO: Write a command to output input.txt removing any line which contains a number.
 # The output should contain 6 lines.
+sed "/[0-9]/d" input.txt
diff --git a/individual-shell-tools/sed/script-04.sh b/individual-shell-tools/sed/script-04.sh
index 0052ac6c4..ff99fddc5 100755
--- a/individual-shell-tools/sed/script-04.sh
+++ b/individual-shell-tools/sed/script-04.sh
@@ -4,3 +4,4 @@ set -euo pipefail
 
 # TODO: Write a command to output input.txt replacing every occurrence of the string "We'll" with "We will".
 # The output should contain 11 lines.
+sed "s/We\'ll/We will/g" ./input.txt
diff --git a/individual-shell-tools/sed/script-05.sh b/individual-shell-tools/sed/script-05.sh
index 2dcc91a0c..4a9d0c153 100755
--- a/individual-shell-tools/sed/script-05.sh
+++ b/individual-shell-tools/sed/script-05.sh
@@ -6,3 +6,4 @@ set -euo pipefail
 # If a line starts with a number and a space, make the line instead end with a space and the number.
 # So line 6 which currently reads "37 Alisha" should instead read "Alisha 37".
 # The output should contain 11 lines.
+sed -E "s/^([0-9]+) (.*)$/\2 \1/" input.txt
diff --git a/individual-shell-tools/sed/script-06.sh b/individual-shell-tools/sed/script-06.sh
index 0b9390170..2747d276b 100755
--- a/individual-shell-tools/sed/script-06.sh
+++ b/individual-shell-tools/sed/script-06.sh
@@ -8,3 +8,4 @@ set -euo pipefail
 # The output should contain 11 lines.
 # Line 3 should be "It contains many lines, and there are some things you may want to do with each of them.".
 # Line 11 should be "We also should remember, when we go shopping, to get 4 items: oranges, cheese, bread, olives.".
+sed -E "s/,([^ ])/, \1/g" input.txt

From 05c6fdd13f1373af7099774080c2844591a4fa52 Mon Sep 17 00:00:00 2001
From: miriamjorna <hoimirextra@gmail.com>
Date: Wed, 29 Jul 2026 00:25:17 +0100
Subject: [PATCH 7/8] Spr1 IndShellTools awk last

---
 individual-shell-tools/awk/script-01.sh | 1 +
 individual-shell-tools/awk/script-02.sh | 1 +
 individual-shell-tools/awk/script-03.sh | 1 +
 individual-shell-tools/awk/script-04.sh | 1 +
 individual-shell-tools/awk/script-05.sh | 1 +
 5 files changed, 5 insertions(+)

diff --git a/individual-shell-tools/awk/script-01.sh b/individual-shell-tools/awk/script-01.sh
index 8db4390af..fc6394c71 100755
--- a/individual-shell-tools/awk/script-01.sh
+++ b/individual-shell-tools/awk/script-01.sh
@@ -4,3 +4,4 @@ set -euo pipefail
 
 # TODO: Write a command to output just the names of each player in `scores-table.txt`.
 # Your output should contain 6 lines, each with just one word on it.
+awk '{print $1}' ./scores-table.txt
diff --git a/individual-shell-tools/awk/script-02.sh b/individual-shell-tools/awk/script-02.sh
index 5956be9bd..f20ca18a7 100755
--- a/individual-shell-tools/awk/script-02.sh
+++ b/individual-shell-tools/awk/script-02.sh
@@ -4,3 +4,4 @@ set -euo pipefail
 
 # TODO: Write a command to output the names of each player, as well as their city.
 # Your output should contain 6 lines, each with two words on it, separated by a space.
+awk '{print $1, $2}' ./scores-table.txt 
diff --git a/individual-shell-tools/awk/script-03.sh b/individual-shell-tools/awk/script-03.sh
index af7c6e8b9..6e6757880 100755
--- a/individual-shell-tools/awk/script-03.sh
+++ b/individual-shell-tools/awk/script-03.sh
@@ -5,3 +5,4 @@ set -euo pipefail
 # TODO: Write a command to output just the names of each player along with the score from their first attempt.
 # Your output should contain 6 lines, each with one word and one number on it.
 # The first line should be "Ahmed 1".
+awk '{print $1, $3}' ./scores-table.txt 
diff --git a/individual-shell-tools/awk/script-04.sh b/individual-shell-tools/awk/script-04.sh
index bf15703c7..5204d1544 100755
--- a/individual-shell-tools/awk/script-04.sh
+++ b/individual-shell-tools/awk/script-04.sh
@@ -5,3 +5,4 @@ set -euo pipefail
 # TODO: Write a command to output just the names of each player in London along with the score from their last attempt.
 # Your output should contain 3 lines, each with one word and one number on it.
 # The first line should be "Ahmed 4".
+awk '$2 == "London" {print $1, $NF}' ./scores-table.txt 
diff --git a/individual-shell-tools/awk/script-05.sh b/individual-shell-tools/awk/script-05.sh
index d1680cb02..8c27868b5 100755
--- a/individual-shell-tools/awk/script-05.sh
+++ b/individual-shell-tools/awk/script-05.sh
@@ -5,3 +5,4 @@ set -euo pipefail
 # TODO: Write a command to output just the names of each player along with the number of times they've played the game.
 # Your output should contain 6 lines, each with one word and one number on it.
 # The first line should be "Ahmed 3".
+awk '{print $1, NF - 2}' ./scores-table.txt 

From 3442ed1443ca315413e6bc977d7fd52a7cc7c1c2 Mon Sep 17 00:00:00 2001
From: miriamjorna <hoimirextra@gmail.com>
Date: Wed, 29 Jul 2026 00:37:46 +0100
Subject: [PATCH 8/8] Restore original Part-1 and Part-2 files

---
 number-systems/Part-1.md | 32 ++++++++++++++++----------------
 number-systems/Part-2.md | 10 +++++-----
 2 files changed, 21 insertions(+), 21 deletions(-)

diff --git a/number-systems/Part-1.md b/number-systems/Part-1.md
index 531bee66f..d8f9c290e 100644
--- a/number-systems/Part-1.md
+++ b/number-systems/Part-1.md
@@ -7,48 +7,48 @@ The goal of these exercises is for you to gain an intuition for binary numbers.
 The answers to these questions should be a number, either in binary, hex, or decimal.
 
 Q1: Convert the decimal number 14 to binary.
-Answer: 1110
+Answer:
 
 Q2: Convert the binary number 101101 to decimal:
-Answer: 45
+Answer:
 
 Q3: Which is larger: 1000 or 0111?
-Answer: 1000
+Answer:
 
 Q4: Which is larger: 00100 or 01011?
-Answer: 01011
+Answer:
 
 Q5: What is 10101 + 01010?
-Answer: 31
+Answer:
 
 Q6: What is 10001 + 10001?
-Answer: 34
+Answer:
 
 Q7: What's the largest number you can store with 4 bits, if you want to be able to represent the number 0?
-Answer: 15
+Answer:
 
 Q8: How many bits would you need in order to store the numbers between 0 and 255 inclusive?
-Answer: 8
+Answer:
 
 Q9: How many bits would you need in order to store the numbers between 0 and 3 inclusive?
-Answer: 2
+Answer:
 
 Q10: How many bits would you need in order to store the numbers between 0 and 1000 inclusive?
-Answer: 10
+Answer:
 
 Q11: Convert the decimal number 14 to hex.
-Answer: E
-
+Answer:
+ 
 Q12: Convert the decimal number 386 to hex.
-Answer: 182
+Answer:
 
 Q13: Convert the hex number 386 to decimal.
-Answer: 902
+Answer:
 
 Q14: Convert the hex number B to decimal.
-Answer: 11
+Answer:
 
 Q15: If reading the byte 0x21 as a number, what decimal number would it mean?
-Answer: 33
+Answer:
 
 Q16: Continues in Part-2
diff --git a/number-systems/Part-2.md b/number-systems/Part-2.md
index 6328076ee..68b0933d9 100644
--- a/number-systems/Part-2.md
+++ b/number-systems/Part-2.md
@@ -7,16 +7,16 @@ The goal of these exercises is for you to gain an intuition for binary numbers.
 The answers to these questions will require a bit of explanation, not just a simple answer.
 
 Q16: How can you test if a binary number is a power of two (e.g. 1, 2, 4, 8, 16, ...)?
-Answer: there is exactly one bit set to 1
+Answer:
 
 Q17: If reading the byte 0x21 as an ASCII character, what character would it mean?
-Answer: !
+Answer:
 
 Q18: If reading the byte 0x21 as a greyscale colour, as described in "Approaches for Representing Colors and Images", what colour would it mean?
-Answer: A very dark grey with almost 1/4 of the white that the given dark grey colour contains
+Answer:
 
 Q19: If reading the bytes 0xAA00FF as a sequence of three one-byte decimal numbers, what decimal numbers would they be?
-Answer: 0170 0000 0255
+Answer:
 
 Q20: If reading the bytes 0xAA00FF as an RGB colour, as described in "Approaches for Representing Colors and Images", what colour would it mean?
-Answer: (electric) purple
+Answer: