Strategy- DS

Remember, on data sufficiency GMAT questions, a definite "no" answer is sufficient, just as a definite "yes" answer is sufficient. A statement will be insufficient only when the answer is "maybe" or "it cannot be determined."

REVISION QUESTIONS

Q6, Quant, MGMAT CAT 4, Marble ratios

Q10, Quant, MGMAT CAT 4, Reverse Primes

Inequalities

While dealing with inequality questions:

1) If there is too much of a hastle testing values: Try to figure out the conceptual approach. Might help.

2) Generally, it is not a good idea to divide an equation or inequality by a variable since dividing by zero is illegal, and a variable might be equal to zero.

A quantity that is cubed retains its original sign: if it starts out positive, it remains positive and if it starts out negative, it remains negative.

Brahamastra

Keep Cool. Read Properly. KKEEP IT COOL

Decimals

tenths digit is the first digit to the right of the decimal point.

Similar Triangles

Triangles are defined as similar if all their corresponding angles are equal or if the lengths of their corresponding sides have the same ratios.

First, recall that in a right triangle, the two shorter sides intersect at the right angle.

if two similar figures have lengths in a given ratio (say A:B), then their areas will have a ratio that is the square of this length ratio (i.e.,A²:B²). Conversely, if the areas are in a given ratio, then the lengths will be in the square root of that ratio. ( Look at MGMAT CAT 4. q 19) Excellent example.