If the number 42573 * is exactly divisible by 72, then the minimum value of * is:
72 = 9 x8, where 9 and 8 are co-prime.
The minimum value of x for which 73$ 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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