perplexus.info :: Numbers : Last digit counts

Last digit counts (Posted on 2014-07-23)

How many 4-digit numbers are there such that their last digit is either sum or product of the first three?

1. EX: 1258 and 4090 qualify.
2. No leading zeroes.

See The Solution Submitted by Ady TZIDON

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	Subject	Author	Date
	computer solution	Charlie	2014-07-23 14:30:25

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