ICSE BoardEnglish MediumSTD 8MATHSPlaying with Numbers3 Marks
Question
$1×5$ divisible by $3$?
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Answer
$1\times 5$ is divisible by $3$
$\Rightarrow 1 + x + 5$ is a multiple of $3$
$\Rightarrow 6 + x = 0, 3, 6, 9,$
$\Rightarrow x = -6, -3, 0, 3, 6, 9$
Since, $x $is a digit
$x = 0, 3, 6$ or $9$
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