1. How many 3-digit number can be formed using the 4th, 7th and 9th digits of the number 937862541 each of which is completely divisible by 7?
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By: anil on 05 May 2019 01.14 am
1, 5 and 8 are the required digits. The 3-digit numbers formed by these are 158, 185, 518, 581, 815 and 851. Of these, only 518 and 581 are divisible by 7. Therefore answer is 2.
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