what testbank or site do you use for test preparation ?
I tried a few test from gmat.jumbotests com and I found them somewhat difficult,
They have questions on quadratic equations, polynomial division , inch to feet conversion. Is the site an acurate reflection of GMAT test?
this was one of the questions they had,
If x, y, z are real and distinct then x ^2 + 4y ^2 + 9z ^2 -6yz - 3zx - 2xy is always
E. None of these
just wondering is this the difficulty level one should expect for GMAT ?