A math question testing your series skill :)
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You are very correct :)
If you will solve in detail... you will come to find out it is X.... It is a CAT question and the answer was X.... try solving once more.... I did solve first with the natural progression method.,.. and then I sat to check it down... and I got X
Oh Yes! You are right. I missed the fact that W ends at 276 and thought that it would end at 300. Thanks a lot for correcting.
no worries friend... to err is human :)