Statistics for 2-digit numbers by clue

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Clue(s)	Answer	% Correct
Square, digits add to 10.	64	100%
Divisible by 9, if you divide by 3 it is still divisible by 9, smaller than 39.	27	77%
Its square root is between 3 and 4, Digits add to more than 5.	15	69%
A prime factor of 999	37	69%
Prime, digits differ by one, if you subtract 2 it is still prime.	43	69%
Digits add to 12, when divided by 4 the answer is divisible by 4.	48	69%
Prime, both digits are themselves prime, the first digit is at least three more than the last.	73	62%
3 distinct prime factors, smaller than 37.	30	54%
Digits add to 9, not a square or cube, first digit is prime, not divisible by 4	54	54%
Differs by one from a square, differs by one from a cube not equal to the square.	26	46%
Square, if you add each digit and the product of the digits, you get the number itself.	49	46%
Only one distinct prime factor, greater than 71, not prime.	81	46%
A factorial	24	38%
A perfect number	28	38%
This number, and this number turned upside-down, which is smaller, have a 2-digit highest common factor.	99	38%