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: ____________1 questions · 4 points

1.A pattern is built in rows. The first figure has 1 row, the second has 2 rows, and so on. In every figure, the first row has 1 dot, the second has 3 dots, the third has 5 dots, and each row after has 2 more dots than the one above it. How many dots are in the eighth figure?[4]
- A64
- B15
- C36
- D72
- E81

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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.A — 64KA-0156Growth patterns and figurate numbers
- BI gave the number of dots in the eighth ROW instead of the whole figure.
- CI added the row numbers 1 through 8 instead of the odd numbers of dots.
- DI multiplied 8 rows by 9, using a rough average row that is one too large.
- EI counted the rows starting from zero and used the ninth square number.

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