perplexus.info :: Just Math : 4d divides 5d

4d divides 5d (Posted on 2014-12-26)

Find all five digit numbers such that the number formed by deleting the middle digit divides the original number.

Source: Canadian math. contest

Submitted by Ady TZIDON

Rating: 5.0000 (1 votes)

Solution: (Hide)

There are 90 possible answers:
mn00*10=mn000, m>0

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