Question

if 5a12 is divisible by 9 find the value of a

Answer 1

Answer:

Add all digits = 5 + a + 1 + 2

= 8 + a

So, If we make a = 1, The number comes 9 which is divisible by 9 itself.

Therefore, 8 + 1 =9

a = 9

Step-by-step explanation:

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