arindamsur wrote:
Why not option B.?
Bunuel wrote:
deya wrote:
Hello,
Bunuel one thing I couldn't understand that how the sum is becoming a multiple of 5 & 7. The required sum = 5x + 7x + something. It is not clear to me. Kindly elaborate.
Bunuel one thing I couldn't understand that how the sum is becoming a multiple of 5 & 7. The required sum = 5x + 7x + something. It is not clear to me. Kindly elaborate.
I think that you misunderstood the question.
We should be able to write one of the options as the sum of 5 consecutive odd integers. Also, we should be able to write the same options as the sum of 7 consecutive odd integers.
525 = 101 + 103 + 105 + 107 + 109.
525 = 69 + 71 + 73 + 75 + 77 + 79 +
...
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