GC65BQ9 Multiples of 3, 5 and 7 (Unknown Cache) in Stockholm, Sweden created by mylittlepolygon

A cache by mylittlepolygon Message this owner

Hidden : 8/20/2016

Size: Size: micro (micro)

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Geocache Description:

If we list all the natural numbers below 10 that are multiples of 3, 5 or 7, we get 3, 5, 6, 7 and 9. The sum of these multiples is 30.

Find the sum of all the multiples of 3, 5 or 7 below 10¹⁸.

Additional Hints (No hints available.)