A three digit perfect square is such that if it is viewed upside … - Vidyadip

Question

A three digit perfect square is such that if it is viewed upside down, the number seen is also a perfect square. What is the number? Hint: The digits $1, 0$ and $8$ stay the same when viewed upside down, whereas $9$ becomes $6$ and $6$ becomes $9.$

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Answer

Three-digit perfect squares are $196$ and $961,$ which looks same when viewed upside down.

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