Question

4. Test the divisibility of the given numbers:
(a) 462654 by 18
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Answer 1

Answer:

no the the number is not divisible by 8 as the last three digits should be divisible by 8 then only the whole number is divisible by 8

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Answer 2

Answer:

Yes It is divisible by 18.

Step-by-step explanation:

A number is divisible by 18 only when it is divisible by both 9 and 2.

now, here is another trick to find divisible by 2, just see whether last digit of a number belong to 2, 4, 6, 8, 0.

if it, then it is divisible by 2.

now, here is another trick to find divisible by 9, just see whether sum of all the digit of a number is divisible by 9 or not.

if it, then it is divisible by 9.

since, 2 and 9 are coprime. therefore, a number whose sum of all the digit of a number is divisible by 9 and last digit of a number belong to 2, 4, 6, 8, 0.

Will be divisible by 18.