Question

5. Which of the following numbers is not divisible by 3
i)1017
ii) 1122
iii) 1027
iv) 1110​

Answer 1

Answer:

1 is divisible beacuse

3×374

Answer 2

Step-by-step explanation:

A number is divisible by 3, if the sum of its all digits is a multiple of 3 or divisibility by 3 .

( i ) 1017

Sum of all the digits of 1017

= 1 + 0 + 1 + 7

= 9 which is divisible by 3

Hence, 1017 is divisible by 3.

( ii ) 1122

Sum of all the digits of 1122

= 1 + 1 +2 +2

= 6 which is divisible by 3

Hence, 1122 is divisible by 3 .

( iii ) 1027

Sum of all the digits of 1027

= 1 + 0 + 2 + 7

= 10 which is not divisible by 3.

Hence, 1027 is not divisible by 3.

( iv ) 1110

Sum of all the digits of 1110

= 1 + 1 + 1 + 0

= 3 which is divisible by 3.

Hence, 1110 is divisible by 3.