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# Official Quant Thread for CAT 2012Quantitative Report

Please continue here for all the Quant queries and discussions.
The links to the previous threads are:
Part 1
http://www.pagalguy.com/forum/quantitative-questions-and-answers/74662-official-quant-thread-cat-2012-a.html
Part 2
http://www.pagalguy.com/forum/quantitative-questions-and...
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@chillfactor said: (a^13+b^13+c^13+d^13) mod (a+b+c+d) is not correct, it will be correct only if a, b, c, d are in AP(a + b + c + d)^13 - (a + b + c + d) is always divisible by 13 ............(1)x^13 - x is always divisible by 13So, (a^13 + b^13 + c^13 + d^13) - (a + b + c + d) is divisible by 13 ..........(2)Subtract the two to get (a + b + c + d)^13 - (a^13 + b^13 + c^13 + d^13) is divisible by 13. Also, this expression is divisible by 2 but not by 4. So, divisible by 26how do we use multi-quote here ???
@[251735:chillfactor] sir,, use cntrl nd den click on quote,,dey will keep adding in text box,,, :)
It is during our failures that we discover the true desire for success
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