11 + 12 + 9 = 32
It is 5*5 = 25
the answer is definitly 0 (zero)!
The fifth perfect number is 33,550,336.
20
No one knows.
The fifth square number of a positive integer is equal to 52 = 25.
36
Because the 5th number which is 5 is the square root of 25.
26 because: 1st one: 21 2nd one: 22 3rd one: 24 4th one: 25 5th one: 26
26
Since the fifth prime number is 11, the first five will go into 11! = 11*10*9*8*...*1 = 39916800. That is not the smallest composite for which it is true but that was not what the question asked for.
Perfect 4th