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Someone help me with divisibility!

For a range of 1 to 500 (inclusive), how many numbers are there divisible by 2 or 3 or 5 or 4...........(6 will be included! :D ).........how to do that? and what if there are more numbers than four?

Note by Asif Hasan
1 year, 8 months ago

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Just use the inclusion-exclusion principle: https://en.wikipedia.org/wiki/Inclusion%E2%80%93exclusion_principle Paul Fournier · 1 year, 7 months ago

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All nos. ending with 0, 2, 4, 6, 8 are divisible by 2..so there are 20 no,from 1 to 500. Nos ending with 0 or 5 are divisible by 5 . U may use A P for finding the nos. 3, 6,9,.......498 is an A P. u can find no. of terms . First term is 3, last is 498 and d=3 Asha Gupta · 1 year, 6 months ago

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@Asha Gupta Wait. How are there 20 even numbers between 1 to 500? Arulx Z · 1 year, 6 months ago

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@Arulx Z typo error..actually 250.. Asha Gupta · 1 year, 6 months ago

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