What would be the answers for the three boxes

Look at the prime factorization. If all the factors have powers that are multiples of 6, then the number is a square and a cube. If they are multiples of 3, then a cube; if multiples of 2, then a square.

1000 = 2³·5³ . . . . a perfect cube

4 = 2² . . . . a perfect square

120 = 2³·3·5 . . . . none of the above (not a square or a cube)

36 = 2²·3² . . . . a perfect square

100 = 2²·5² . . . . a perfect square

49 = 7² . . . . a perfect square

125 = 5³ . . . . a perfect cube

25 = 5² . . . . a perfect square

51

step-by-step explanation:

73-22=51 the   mass number minus the amount of protons gives you the amount of neutrons