Question

21y5 is a multiple of 3 then value of y is=

Answer 1

$<h2 > hey there$



$<h5 > answer....$



We know that any multiple of 3 is the sum of itself.


so, 2+1+y+5 = 9

8+y =9

y =9-8

y =1



$<tt > or$


2+1+y+5 = 12

y+8=12

y=12-8

y=4



Hope it helps you


$<marquee > prabhudutt$

Answer 2

Answer:

Step-by-step explanation:

We know that the sum of the digits of the number should be divisible by 3 so that the number is divisible by 3.

Therefore 2+1+y+5 should be divisible by 3.

If y = 1

2+1+(1)+5 = 9 , which is divisible by 3.

If y = 4

2+1+(4)+5 = 12 , which is also divisible by 3.

If y = 7

2+1+(7)+5 = 15 , which is also divisible by 3.

Hence the value of y is either 1 or 4 or 7.