7
Only "2" and "5".
You can multiply 1 and 20, 2 and 10, 4 and 5.
2 3 5.
2 x 5
what 2 numbers add to make five and multiply to make -36
2 x 2 x 5 x 5
2 x 2 x 5 x 5
3
7
three times 2 and two times 5 that is 2*2*2*5*5
They are: 2*5*5*5 = 250
2 x 5 x 5 x 5