GRE math lesson 4

The words " is" or " are" in the text correspond to the equals sign. if we have A is 50 more than B translates A= B+50 if we have A is 50 less than B translate A= B-50 Twice A is 100 less than three times B translates 2A=3B-100 A is 50% of B translates A=.5B A is 50% greater than B A=1.5 B

Since the tank starts half full, it would take these three pumps half the time to fill the rest—that's 6 hours.

The factors of 125 are {1, 5, 25, 125}

The only way to represent 125 as the product of three different factors is as 125 = 1*5*25. We could rearrange those three factors around the dimensions of the box, so any one of those three factors could be the length of the height.

Let Roberta's present age = x. That means that Gene's present age is x+7.

Let Roberta's present age = x. That means that Gene's present age is x+7.

equilateral triangle

A triangle with three congruent sides (equal sides)

The ratio of c: d is one of the most special number in all mathematics pi

c: circumference d: diameter

A= 1/2 bh bigger triangle A= 16sqrt3 smaller triagle A= 4sqrt3 the shaded area = 14sqrt3

shoe

after 1, we have a units digit of 7, 2 9 3 3 4 1 period is four , and extend the pattern of using the multiples of the period

Strategy: 1. Focus on single -digit multiplication only. 2. Look for the repeating pattern (period often is 4) 3. Extend the pattern, using multiples the period

vertical angles the way you rotate change the angle answer is a and b sometimes GRE gives really same shape-> you have to make it different.

A pair of opposite congruent angles formed by intersecting lines