Question

a 3 digit number 24a is divisible by 9 what is the value of a

Answer 1

Answer:

multiples of 9 till ten

9 18 27 36 45 54 63 72 81 90

subtract the second digit of the 2 digit multiple of 9 and it should give a multiple of 9

i.e 24 - 0 = 24

24 - 1 = 23

24 - 2 = 22

24 - 3 = 21

24 - 4 = 20

24 - 5 = 19

24 - 6 = 18

24 - 7 = 17

24 - 8 = 16

Here 18 is a multiple of 9

now check the multiple of 9 having first digit 6

it's 63

therefore, a = 3

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