GRE/GMAT/CAT- Quantitative ability - Math Algebra - 702

[pippomaneful]

let n, m be two consecutive integers. but then m=n+1. the difference of their squares is m^2-n^2=(m-n)(m+n)=(n+1-n)(n+1­+n)=1(2n+1)=2n+1, which is an ODD integer for every n. this how you should have solved that exercise, making counter-examples is not incorrect but it's not the shortest way.

[kumarranganath]

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[nieceypiecey100]

This video is annoying to follow. too much inconsistent scrolling.

[bellacnella18]

thanks, seems easy enough

[sampara2006]

Wow Awesome expalanation. Truly amazing method of solving math. I am looking for the complete set of topics in GRE Math and a set of mock tests which would be much more useful.

[upt0wnz]

x = z/2

[sunnyatscot]

what is D??