If a number $72 x - - 2$ is divisible by 4, find the possible values of $x .$

3

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5

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7

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9

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Solution

The correct option is D $9$
For a number to be divisible by $4,$ the last two digits must be divisible by $4.$

Considering $x = 3, 32$ is divisible by $4$ .
$\Rightarrow 7232$ is also divisible by $4.$
$∴ 3$ is a possible value of $x .$

Similarly, $x = 5, 7, 9$ satisfies the above condition.

Hence, $3, 5, 7$ and $9$ are the possible values of $x .$

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