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Write five numbers which you cannot decide whether they are square just by looking at the unit’s digit. |
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Answer» As we know that any natural number ending with 0, 1, 4, 5, 6 or 9 can be or cannot be a square number. Here are the five examples which you cannot decide whether they are square or not just by looking at the units place: (i) 2061 \(\therefore\)unit digit is 1. So, it may or may not be a square number (ii) 1069 \(\therefore\) unit digit is 9. So, it may or may not be a square number (iii) 1234 \(\therefore\)unit digit is 4. So, it may or may not be a square number (iv) 56790 \(\therefore\) unit digit is 0. So, it may or may not be a square number (v) 76555 \(\therefore\) unit digit is 5. So, it may or may not be a square number |
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