Question

Which of the following numbers is divisible by both 3 and 5
a) 3240 b) 4235 c) 3426 d) none

Answer 1

Answer:

a) 3240

Step-by-step explanation:

3240 ÷ 3 = 1080

3240 ÷ 5 = 648

Answer 2

Here we have to find the number which is divisible by both 3 and 5

Now we will first have to know the divisibility rule of 3 and 5

• For 3, if the sum of digits is the multiple of 3, then the number will be divisible by 3.

• For 5, if the number ends with 0 or 5, then the number will be divisible by 5.

Now here, in option a, 3240

The sum of digits , 3 + 2+ 4+ 0 = 9

9 is a multiple of 3, therefore 3240 is divisible by 3

3240 has 0 as the last digit, so it is divisible by 5

Therefore, option a will be the correct answer