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What is the sum of all positive integers lying between 200 and 400 that are multiples of 7?

A) 8729
B) 8700
C) 8428
D) 8278

Correct Answer:

A) 8729

Description for Correct answer:
Least number divisible by 7 and above

200 is 203.

Greatest number divisible of 7 and below

400 is 399.

Total numbers divisible by 7 between

200 to 400 are 29

Now, sum of n terms of AP = \( \Large \frac{n}{2} \) (a + 1)

where, a = 203, 1=399 and n = 29

= \( \Large \frac{29}{2} \)(203+399)

= 8729

Part of solved Number System questions and answers : >> Aptitude >> Number System

Comments

Similar Questions

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