Question

Determine which of the following are divisible by '3'. (1) 4689 (ii) 726352​

Answer 1

Answer:

first add up the numbers 4 + 6 + 8 + 9 it is = 27

Then 27 is divisible by 3 because 3 ×9 is 27.

it means 4689 divisible by 3

same you have to do in second case

Step-by-step explanation:

I hope it is helpful

Answer 2

To find : which of the following are divisible by ' $3$ '. (i) $4689$ (ii) $726352$

Solution :

• According to divisibility test of $3$  a number is divisible by $3$ if sum of its digit is divisible by $3$ .

• Therefore , we first add digits of number and then check if the sum is divisible by $3$ or not .

    (i) $4689$  

       $= 4 + 6 + 8+ 9 \\= 27$

• Since , $27$ is divisible by $3$  we can say that number $4689$  is divisible by $3$ .

    (ii) $726352$  

       $= 7 + 2 +6+3+5+2 \\= 25$

• Since , $25$ is not divisible by $3$  we can say that number $726352$ is not  divisible by $3$ .

Hence , from above observations we conclude that only (i) $4689$ is divisible by $3$.