Dreamshire

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Figurate numbers

This tag is associated with 3 posts

By Mike Molony ⋅ May 17, 2009 ⋅ One comment

Find the sum of all the natural numbers that are multiples of 3 or 5 using the inclusion-exclusion principal.

By Mike Molony ⋅ May 17, 2009 ⋅ One comment

Find the difference between the sum of the squares and the square of the sum.

By Mike Molony ⋅ April 27, 2009 ⋅ One comment

Count how many ‘triangle words’ a list of common English words contain.

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