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Write five numbers which you cannot decide whether they are square just by looking at the unit’s digit.
To do:
We have to write five numbers for which we cannot decide whether they are squares just by looking at the unit’s digit.
Solution:
We know that,
A perfect square can only end with the digits 1, 4, 5, 6, 9 and 0.
Therefore,
Five numbers for which we cannot decide whether they are squares just by looking at the unit’s digit are 2026, 2024, 2025, 2021, 2029.
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