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2 Answers

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Possible values of P,Q are (1,64), (2,32), (4,16), (8,8)

Possible values of P+Q are 65, 34, 20, 16

35 is not possible. Hence, option D would be the answer
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Factor of $64$ are: $1,2,4,8,16,32,64$.

It is given that $P\times Q=64$. The number of pairs of $(P\times Q)=64$ are:

Options $(P\times Q)=64$ $P+Q$
A $16\times 4=64$ $20$
B $64\times 1=64$ $65$
C $8\times 8=64$ $16$
D $32\times 2=64$ $34$

So from above Option (D) is not possible.

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