Question

Chapter Check-up
1. If 21y8 is a multiple of 6 where y is a digit, find the value of y.​

Answer 1

Answer:

y=1

Step-by-step explanation:

to obtain 'y' we check the divisibility of the number by 6

if a number is divisible by 6 it has to be divisible by 2 and 3 also,

if y=1

the No. formed will be 2118

2118÷6 = 353

hope it helps :)

pls mark as brainliest

Answer 2

Divisibility rule for 6 is that it should be divisible by both 2 and 3
21y8 would be divisible by 2 as it ends with an even number
2+1+8=11 so y has to be a number which when added to 11 gives a multiple of 3
So y can be equal to 1 or 4 or 7