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Look for 3 sevens (Posted on 2016-04-01)

Find the smallest number N with the property that its first 3 multiples (i.e. N,2N,3N) contain the digit 7.

Analytical solution preferred.

Bonus: Same for the first 4 multiples.

No Solution Yet Submitted by Ady TZIDON

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Subject	Author	Date
computer finds overlooked values	Charlie	2016-04-01 10:48:18
the rough way	armando	2016-04-01 09:34:52

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