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Junior Mathematical Olympiad

Algebra Difficulty 2.3 Junior Find the answer Netherlands

A four digit number $\overline{aabb}$ , that is, the number whose digits are $a, a, b$ , and $b$ , is the square of an integer.
Of which integer is $\overline{aabb}$ the square?

Your answer

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

Solution

$88$

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Source: MathNet, licensed CC-BY-4.0. Statement reproduced verbatim; metadata (topic, difficulty) added by this project.