If $¯ ¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯ ¯ 98215 x 2$ is a number with x as its tens digits such that it is divisible by 4.
Find all the possible values of x.

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Solution

$∵$ The number $¯ ¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯ ¯ 98215 x 2$ is divisible by 4
$∴$ The number formed by tens digit and units digit will also be divisible by 4
$∴ ¯ ¯¯¯¯ ¯ x 2$ is divisible by 4
$∴$ Possible number can be 12,32,52,72,92
$∴$ Value of x will be 1,3,5,7,9

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