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Grade 12 Computing Challenge Puzzles Worksheet with Answers
Grade 12 (US) · Year 13 (UK) · Class 12 (India) · Computer Science
Unit 5: Going FurtherChallenge PuzzlesChallenge
Puzzles that stretch computational thinking: bit patterns, logic and clever counting. This free high school worksheet has 12 questions and a full answer key. Print it or save it as a PDF — every answer is checked by code, not guessed.
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Practice Sheetaethelsystems.comComputing Challenge Puzzles
Grade 12 · Computer Science
Name
Class
Date
Learning goal: Challenge Puzzles
Directions: Read each question carefully and write your answer on the line. Use the diagram to help you.
A playlist app lets you switch each of 4 songs on or off. How many different playlists (including the empty one) are possible?
Answer: 16
RememberBinary place values
- 1
What is the largest whole number you can store in 7 bits?
- 2
A playlist app lets you switch each of 6 songs on or off. How many different playlists (including the empty one) are possible?
- 3
A playlist app lets you switch each of 3 songs on or off. How many different playlists (including the empty one) are possible?
- 4
5 computers each connect directly to every other computer with one cable. How many cables are needed?
- 5
What is the largest whole number you can store in 4 bits?
- 6
What is the largest whole number you can store in 6 bits?
- 7
9 computers each connect directly to every other computer with one cable. How many cables are needed?
- 8
In a list of every 3-bit pattern, how many patterns have exactly one 1?
- 9
In a list of every 4-bit pattern, how many patterns have exactly one 1?
- 10
How many different patterns can 7 bits make?
- 11
A playlist app lets you switch each of 5 songs on or off. How many different playlists (including the empty one) are possible?
- 12
In a list of every 2-bit pattern, how many patterns have exactly one 1?
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Free printable worksheets with answer keys · aethelsystems.com/worksheets/computer/12/challenge_cs
Answer key — Computing Challenge Puzzles (Grade 12)
- 1.127
- 2.64
- 3.8
- 4.10
- 5.15
- 6.63
- 7.36
- 8.3
- 9.4
- 10.128
- 11.32
- 12.2
Answer key (click to show)
- 1.127
- 2.64
- 3.8
- 4.10
- 5.15
- 6.63
- 7.36
- 8.3
- 9.4
- 10.128
- 11.32
- 12.2
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