Find the number of integers from 1 to 10,000 which are divisible by either 13 or 51

regards

Sridhar

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- Nov 30th 2009, 01:32 AMyshridharFind the number of integers
Find the number of integers from 1 to 10,000 which are divisible by either 13 or 51

regards

Sridhar - Nov 30th 2009, 05:38 AMGrandad
Hello yshridhar

Welcome to Math Help Forum! , so there are integers from to that are divisible by .

In the same way, you can find the number of integers that are divisible by .

Add this number to . Then you will need to subtract the number of integers that are divisible by , because they will have been counted twice. (Note that , so and have no common factors.)

Can you complete this now?

Grandad - Nov 30th 2009, 06:55 PMyshridhar
Thank you Grandad

regards

Sridhar