Question 192

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

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Solution

Given digits are 1,2,3 and 4.
For the smallest number, we will arrange the given digits in ascending order. But the number should also be divisible by 4, so we will arrange the digits in such a way that it's last two digits should be divisible by 4.
$∴$ Required number = 1324.

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Question 192 Using each of the digits 1,2,3 and 4 only once, determine the smallest 4-digit number divisible by 4.

Given digits are 1,2,3 and 4. For the smallest number, we will arrange the given digits in ascending order. But the number should also be divisible by 4, so we will arrange the digits in such a way that it's last two digits should be divisible by 4. ∴ Required number = 1324.

Question 192

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

Given digits are 1,2,3 and 4.
For the smallest number, we will arrange the given digits in ascending order. But the number should also be divisible by 4, so we will arrange the digits in such a way that it's last two digits should be divisible by 4.
$∴$ Required number = 1324.