25
225 75, 3 25, 3, 3 5, 5, 3, 3
The factor tree is as follows: 114 57,2 19,3,2
32 = 25
Since 61 is already prime, a factor tree is not necessary. The prime factorization of 51 is 3 x 17, which wouldn't make much of a tree. More like a factor shrub.
11 is prime. No tree. 25 5,5
25 5,5
25 5,5
25
5*5
25 5,5 5 x 5 = 25
225 75, 3 25, 3, 3 5, 5, 3, 3
The factor tree is as follows: 114 57,2 19,3,2
no
25 x 3
32 = 25
25 5,5 5 x 5 = 25