Question

9. In the following number replace by the smallest digit to make the number divisible by 3
(a) 5039
(b) 64*78





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Answer 1

Answer:

a)5039-When we remove 50,then the number makes 39.

So,the smallest digit to make the number divisible

by 3 is 39

Answer 2

ANSWER :

a) 5039 is already divisible my 3.

b) In place of * should be 5, then 64*(3)78 is divisible by 3.

divisibility of 3 :

1) add up all the digits of a number.

2) if the sum is divisible by 3, then the number is divisible by 2.

3) let's take a example 534.

sum of all digits are : 5 + 3 + 4 = 12.

12 is divisible by 3, so 534 is also divisible by 3.