Question

how many numbers are inbetween 200 and 500 leave a reminder 2 are dividing 7 find the sum
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Answer 1

first no. divisible by 7 after 200

is 203

we will form an AP

where common difference is 7

and first term is 205

AP= 205,212,219...till499

499=a+(n-1)d

499=205+(n-1)7

294/7=n-1

42=n-1

n=43 terms

YOUR ANSWER IS 43 TERMS

Answer 2

205, 212,... , 499 is an AP

n = 43

Sn = 15136