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Kobotan [32]
3 years ago
7

Find the sum of all the integers from 1 to 100 that are not multiples of 7

Mathematics
1 answer:
Mars2501 [29]3 years ago
8 0

Answer:

4343

Step-by-step explanation:

To find multiple of 7 from 1 to 100,

Take the quotient of 100/7=14

n=100 (number of terms)

n=100-14 (Without Multiple of 7=number of terms - multiple of 7)

=>n=86

Sum of 1 to 100 => Sn = n/2(a + an)

                          => Sn = 86/2(1+100)

                          => Sn = 43(101)

                          => Sn = 4343

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