Question

A and B are two positive integers such that AB=64.Which of the following is not the correct value of A+B?

a) 65 b) 35

c) 16 d) 20

Answer 1

Solution,
factors of 64 and sum them up:
1*64=64 (1+64=65)
2*32=64 (2+32=34)
4*16=64 (4+16=20)
8*8=64 (8+8=16)

therfore...35 is the answer :)
please like if you satisfied...thanks