Mbach5183 Mbach5183

06-12-2017
Mathematics

contestada

How many integers between 1-100 are divisible by 3 or 5 or 7?

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loupickervance loupickervance

09-12-2017

3 6 9 12 15 18 21 24 27 30 33 36 39 42 45 48 51 54 57 60 63 66 69 72 75 78 81 84 87 90 93 96 99 = 33

5 10 20 25 35 40 50 55 65 70 80 85 95 100 = 14
7 14 28 49 56 77 91 98 = 8

So 55 numbers are divisible by 3 or 5 or 7.

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