Question

Using each of the digits 1, 2, 3 and 4 only once, determine the smallest 4-digit number divisible by 4.

Answer 1

$By \:using \: 1,2,3 \:and \: 4 \:only \: , the \\smallest \:4-digit \: number \: divisible \: by \\4 \:is \:\underline { \green { 1324 }}$

Explanation:

$\underline{\pink{ Divisibility \:rule \: by \:4: }}$

If the number formed by the last two digits of the given number is divisible by 4 or if the last two digits are are '0's.

Here, Smallest four digit number formed using 1,2,3 and 4 only once is 1234 .

But last two digits of 1234 is 34 is not divisible by 4.

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