Question

find the sum of all 3 digit numbers which give remainder 1 when divided by 7

Answer 1

Answer:

the answer is 70464.

Step-by-step explanation:

a is 106

d is an is 995 (total terms)

to find n, use

an=2a+(n-1)d

here ,an is 995

you will get

n=128

now,use the formula

n/2 (2a+(n-1)d)

to derive the final answer.

hope it helps.

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