Worksheet generator

Pick what you want, print the page. The answer key comes with it, on its own sheet, and it tells you the mistake behind every wrong choice — not just which letter is right.

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Math Kangaroo practice

Name: ______________________Date: ____________2 questions · 10 points

1.A machine turns 3 into 7, 5 into 11 and 8 into 17. What does it turn 12 into?[5]
- A19
- B21
- C24
- D25
- E29
2.Squares of dots grow: 1 dot, then 4, then 9, then 16. How many dots are in the seventh square?[5]
- A25
- B36
- C42
- D49
- E64

Kangaroo Atlas · https://kangaroo-atlas.vercel.app · seed 1 · CC BY-NC-SA 4.0 · Independent project, not affiliated with Math Kangaroo in USA, NFP.

Answer key — Math Kangaroo practice

Each wrong choice carries the thinking that produces it. When a student picks C, this is what they were doing.

1.D — 25KA-0106Inferring a rule from examples
- AI used the rule add 4, which fits the first example but not the others.
- BI found a rule from two examples only and never tested it against the third.
- CI doubled the input and forgot the extra one that every example needs.
- EI used double and add five, which fits none of the examples exactly.
2.D — 49KA-0138Growth patterns and figurate numbers
- AI continued the pattern to the fifth square instead of the seventh.
- BI stopped one square short, giving the sixth instead of the seventh.
- CI added 6 to the sixth square's 36, treating the differences as constant.
- EI continued one square too far and gave the eighth.

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