Write five numbers which you cannot decide whether they are square just by looking at the unit’s digit.
Write five numbers which you cannot decide whether they are square just by looking at the unit’s digit.
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Any natural number ending with 0, 1, 4, 5, 6 or 9 can be or cannot be a square number.
Hence,
The five examples are:
(i) 2061
The ending digit is 1. Hence, it may or may not be a square number
(ii) 1069
The ending digit is 9. Hence, it may or may not be a square number
(iii) 1234
The ending digit is 4. Hence, it may or may not be a square number
(iv) 56790
The ending digit is 0. Hence, it may or may not be a square number
(v) 76555
The ending digit is 5. Hence, it may or may not be a square number
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