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Decimal Expansion of Rational and Irrational Numbers

P and Q are...

Question

$P$ and $Q$ are two positive integers such that $P Q = 64.$ Which of the following is not the correct value of $P + Q$ ?

20

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65

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16

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35

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Solution

The correct option is B $35$
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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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

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