if N=1 then A(N)=10..if N=2 then A(N) = 13 and so on... A(N) = 10, 13, 16, 19.... then if the sum makes 275 it means that the maximum N = 11 (just try it) and the median is 25 same thing with statement 2, which tells us that the range is 30, which means the last term is 40! so the median is still 25...

solution of B is -1/6 right?

Difficult square root properties...extreme!!!!

hallo my friend, gmat is on thursday and I can't solve this equation...any idea on how to solve it quickly?

I a

At the beginning I was thinking between A and B... Then I put aside the fact that it was a VERBAL question and I put my QUANT cd rom in my brain... if the charged price has increased by 10 times in 40 years, and the inflation has increased only by 4 times, this strenghten the argument, not weakens, ...

the key for the last problem, which might confuse somebody, is that PEOPLE are compared to INTEGERS...in theory, with less than 30 women, you might think to 5 children, 11 men and...12,5 women! which is impossible...clearly, women must be 25... regarding the car dealer, this is quite simple... $ 200...

thanks a lot guys! I am quite quick in calculation so it took 4/5 minutes to make the ABCDEF count, but this formula is much quicker...

would you consider this question EXTREMELY difficult or not so much?

Seated next to eachother

In many ways can Ann, Bea, Cam, Don, Ella, and Fay be seated if Ann and Bea cannot be seated next to each other?

a) 240
b) 360
c) 480
d) 600
e) 720