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8Â years, 8Â months ago
For how many natural numbers less than 100, total numbers of factors will be even?
8Â years, 8Â months ago
Only perfect squares have odd no. of factors, so all except 1, 4, 9, 16, 25, 36, 49, 64, 81 will have even no. of factors. So answer is 90 nos.