P and Q are two positive integers such that PQ = 64. Which of the following cannot be the value of P + Q?
A 16
B 20
C 35
D 65
Solution
Correct Answer: Option C
Given, P and Q are two positive integers and PQ = 64
64 = 1 × 64 = 2 × 32 = 4 × 16 = 8 × 8 The possible combinations of (P, Q) So that, the product is 64 are (1, 64), (2, 32), (4, 16) and (8, 8) ∴ P + Q cannot be 35.
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