Question

Test the divisibility of the following numbers by 3
1. 531109
2. 923661
3. 6742089
4. 654032​

Answer 1

Step-by-step explanation:

1. 531109

5+3+1+1+0+9

=19

19 is not divisible by 3

.'. 531109 is not divisible by 3

2. 923661

9+2+3+6+6+1

=27

27 is divisible by 3

.'. 923661 is divisible by 3

3. 6742089

6+7+4+2+0+8+9

= 36

36 is divisible by 3

.'. 6742989 is divisible by 3

4. 654032

6+5+4+0+3+2

= 20

20 is not divisible by 3

.'. 654032 is not divisible by 3

Answer 2

Divisibility rule of 3 :-

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

1 . 531109

A. Sum of digits = 5+3+1+1+0+9

                            = 19

19 is not divisible by 3 , so 531109 is not divisible by 3.

+++++++++++++++++++++++++

2 . 923661

A. Sum of digits = 9+2+3+6+6+1

                            = 27

27 is divisible by 3 , so 923661 is divisible by 3.

+++++++++++++++++++++++++

3 . 6742089

A. Sum of digits = 6+7+4+2+0+8+9

                            = 36

36 is divisible by 3 , so 6742089 is divisible by 3.

+++++++++++++++++++++++++

3 . 654032​

A. Sum of digits = 6+5+4+0+3+2​

                            = 20

20 is not divisible by 3 , so 654032​ is not divisible by 3.

Here's the answer :

Test the divisibility of the following numbers by 3

1. 531109      ❌❌❌

2. 923661    ✅✅✅

3. 6742089  ✅✅✅

4. 654032​    ❌❌❌

Hope it helps...