1.

If 3-digit number 24x is divisible by 9 then find the value of x. Where x is a digit.

Answer»

Sum of the digit = 2 + 4 + x = 6 + x 

Given Number is 24 x

Sum of the digit must be divide by 9 but it is possible if 6 + x is either 9 or 18 

If 6 + x = 9 

Then x = 9 – 6 = 3 

If 6 + x = 18, then x = 18 – 6 = 12 

Here, x is a digit, so x ≠ 12

Hence, x = 3



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