P and Q are two positive integers such that PQ = 64. Which of the following cannot be the value of P+Q?
Option (d)
PxQ = 64 = 1 × 64 = 2 × 32 = 4 × 16 = 8 × 8.
Corresponding values of P + Q are 65, 34, 20, 16.
Therefore, P + Q cannot be equal to 35.