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, 2020

Combinatorics Difficulty 1.0 Junior Find the answer Canada

How many ☐ symbols are in the figure?

$24$ $20$ $15$ $17$ $25$

Your answer

A number or a short expression. Fractions can be typed as 3/2, and spacing doesn't matter.

Solution

The figure includes 5 groups of 5 squares.

Thus, there are $5 \times 5 = 25$ squares in total.

Figure for this problem

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Source: CEMC, University of Waterloo, licensed CC-BY-NC-4.0. Statement reproduced verbatim; metadata (topic, difficulty) added by this project.