CEMC, University of Waterloo · Canada
Beaver Computing Challenge practice
CEMC computing challenge. Per-level marks: grades 5-6 score A=6, B=5, C=4; grades 7-10 score A=8, B=6, C=4; blanks score 2 up to 5 blanks (grades 5-6) or 6 blanks (older grades). Practice set follows the grades 7-10 paper: 15 multiple-choice questions in 45 minutes.
Contest facts
- Who can write:
- Grades 5-10
- Format:
- 12 questions (grades 5-6) or 15 questions (grades 7-10), all multiple-choice
- Time limit:
- 45 minutes
- Calculator:
- No calculator needed; logic puzzles
- Dates:
- 9-20 Nov 2026 (window)
- Scoring:
- Correct answers earn their Part points, 2 per blank answer (up to 6 blanks), 0 per wrong answer
Topics: Logical thinking, Computing concepts. Official information: CEMC, University of Waterloo
About these questions
Every question on this page is original: written for this site in the style of the Beaver Computing Challenge contest, never copied from a past paper. Each question passed an independent second solve before publication, and every answer comes with a full worked solution and the most common mistake.
Practice one question at a time, take the timed mock under the real contest clock, or print the set with its answer key. Progress is saved in your browser only; there is no account.
Practice engine
Question 1 of 15 · Level A · Pattern recognition · 8 points · No calculator needed; logic puzzles
A kitchen wall is tiled in a repeating pattern: red circle, blue triangle, green square, yellow diamond, red circle, blue triangle, green square, yellow diamond, and so on. What is the 23rd tile in the pattern?
Progress is saved only in this browser. There is no account and nothing is sent to us.
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