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177 problems, every one written from scratch, every wrong answer carrying the mistake that produces it. 708 explanations in all.

Level

1–2
3–4
5–6
7–8
9–10
11–12

Point value

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5 pt

Strand

NUMNumber & Arithmetic
CNTCounting
GEOGeometry & Visualization
LOGLogic & Deduction
PATPatterns & Sequences
MODModeling & Word Problems
CFTContest Craft

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3 problemsClear all filters

KA-0119
3 points, difficulty 1 of 3Level 3–4not yet calibrated
Bo has 24 marbles and gives a third of them to Ana. How many more marbles does Bo have than Ana now?
CFT-01Find what is actually being askedalso NUM-09
KA-0120
3 points, difficulty 1 of 3Level 3–4not yet calibrated
A cat walks 3 m north, then 4 m east, then 3 m south. How many metres is it now from where it started?
CFT-02Draw the diagramalso GEO-02
KA-0127
3 points, difficulty 1 of 3Level 3–4not yet calibrated
One minute is left. Three questions have no answer written and you cannot do any of them. Nothing is taken off for a wrong answer. What should you do?
CFT-09Never leave a blank — there is no penaltyalso CFT-08