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• The number is not an odd number.

• It has exactly four factors.

• If you reverse the digits, a prime number is formed.

• The sum of the digits is a two digit prime number.

• The number is less than the square root of 10^4 .

• One of the digits is a square number.

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74

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74

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Oh, well done B)) and so quickly! Was too easy for you...

What if the number has six factors? <_<

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Posted · Report post

92 or 98 for 5 factors.

Don't think 6 factors is possible <_<

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Posted · Report post

92 or 98 for 5 factors.

Don't think 6 factors is possible <_<

98 is ok for 5 factors -- 1, 2, 7, 49, 98

92 is for 6 factors (not five!) -- 1, 2, 4, 23, 46, 92

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