Question

Check the divisibility of the following numbers by 3 TOS 2. 616 3 294 2 4. 432 EXERCISE 1.2 1 1. Ir21y5 is a multiple of 9, where y is a digit, what is the value of y? 2. If 3125 is a multiple of 9, where z is a digit, what is the value of z? You will find that there are two answers for the last problem. Why is this so? 3. If 24x is a multiple of 3, where x is a digit, what is the value ofx? (Since 24x is a multiple of 3, its sum of digits 6+x is 2 where z is a digit, what might be the values of z?​

Answer 1

Answer:

34x is multiple of 3

If 3+4+x=7+x is divisible by 3

Then x+7=9

x=9−7

=2

∴x=2,5,8

(ii) 74×5284 is divisible by 3

7+4+x+5+2+8+4 is divisible by 3

then 30+x is divisible by 3

∴x=0,3,6,9