I think of a number (say $x$ ), multiply it by $4$ and $5$ , divide the result by $2$ , take away the number I first thought of and I get the answer as $18$ . The number I first thought of is

2

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a multiple of

3

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4

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divisible by

5

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Solution

The correct option is A $2$
$\frac{x \times 4 \times 5}{2} - x = 18$
or $10 x - x = 18$
or $9 x = 18$
or $x = 2$

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I think of a number (say x), multiply it by 4 and 5, divide the result by 2, take away the number I first thought of and I get the answer as 18. The number I first thought of is

The correct option is A 2x×4×52−x=18or 10x−x=18or 9x=18or x=2

I think of a number (say $x$ ), multiply it by $4$ and $5$ , divide the result by $2$ , take away the number I first thought of and I get the answer as $18$ . The number I first thought of is

The correct option is A $2$
$\frac{x \times 4 \times 5}{2} - x = 18$
or $10 x - x = 18$
or $9 x = 18$
or $x = 2$