Question
If the number 42573 * is exactly divisible by 72, then the minimum value of * is :
Answer: Option C
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72 = 9 x 8, where 9 and 8 are co-prime.
The minimum value of `x` for which 73`x` is divisible by 8 is , `x`= 6.
Sum of digits in 425736 = ( 4 + 2 + 5 + 7 + 3 + 6) = 27, which is divisible by 9.
`therefore` Required value of * is 6
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