Math Ticker

Substitution and equivalence

problem solving
algebra
GMAT
test strategies

Modular arithmetic

modular arithmetic
GMAT
test strategies

A tool to refute integer-valued answer choices.

Factoring trinomials

algebra
factoring
quadratic equation

Widget production

problem solving
ratio
work problem
GMAT

Three pipes and a tank

problem solving
ratio
work problem
GMAT

How to avoid fractions in work problems.

From NYC to Boston

data sufficiency
ratio
speed time distance
GMAT

Constant speed is about ratios.

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Math Ticker