What is the missing number in this series - 1,16,36,__,81,100,144

Question

Can you complete the table series puzzle by replacing the ?? with the correct number?

81   36   144 

??   25   16 

64   100  49

Answer 1

Answer is 64

Take number squares except for prime numbers.

1*1 = 1
2 and 3 are prime numbers
4*4=16
5 prime number
6*6=36
7 prime number
8*8=64
9*9=81
10*10=100
11 prime number
12*12=144