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Maths-

General

Easy

Question

Let $X$ and $Y$ be the sets of all positive divisors of 400 and 1000 respectively (including 1 and the number). Then, $n left parenthesis X intersection Y right parenthesis$ is equal to

(a) 4
6
8
12

The correct answer is: 12

$X intersection Y equals left curly bracket 1 comma blank 2 comma blank 4 comma blank 5 comma blank 8 comma blank 10 comma blank 20 comma blank 25 comma blank 40 comma blank 50 comma blank 100 comma blank 200 right curly bracket$
$therefore blank n open parentheses X intersection Y close parentheses equals 12$

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