![Ex 16.2, 1 - Chapter 16 Class 8 Playing with Numbers - Part 2](https://d1avenlh0i1xmr.cloudfront.net/da440436-7086-4a73-b5f7-62794b267ee9/slide2.jpg)
Last updated at April 16, 2024 by Teachoo
Question 1 If 21y5 is a multiple of 9, where y is a digit, what is the value of y? We know that, A Number is divisible by 9, if sum of digits is divisible by 9 21y5 Sum of digits = 2 + 1 + y + 5 = 8 + y Let us check different values of y & check if number is divisible by 9 Sum of digits = 8 + y