GMAT Formulas
Area of a circle formula - ANSWER A= πr²
Area of a square/rectangle - ANSWER A= bh
Perimeter of a rectangle - ANSWER P= 2(a+b)
Perimeter of a square - ANSWER P = 4s
perimeter of a circle - ANSWER P = 2πr
Basic Pythagorean Triple 1 - ANSWER (3, 4, 5), (5, 12, 13)
Basic Pythagorean Triple 2 - ANSWER (7, 24, 25), (8, 15, 17)
Basic Pythagorean Triple 3 - ANSWER (12, 35, 37), (20, 21, 29)
Basic Side angle ratio 1 - ANSWER 45°:45°:90° (x:x:x√2)
Basic Side angle ratio 2 - ANSWER 30°:60°:90° (x: x√3: 2x)
Rules for Odds and Evens - ANSWER odd ± even = odd
odd * odd = odd
everything else is even!
Common Fractions 9/16 - ANSWER 0.5625
Common Fractions 5/8 - ANSWER 0.625
Common Fractions 11/16 - ANSWER 0.6875
Common Fractions 3/4 - ANSWER 0.75
Common Fractions 13/16 - ANSWER 0.8125
Common Fractions 7/8 - ANSWER 0.875
Common Fractions 15/16 - ANSWER 0.9375
Common Fractions 1/3 - ANSWER 0.333
Common Fractions 1/5 - ANSWER 0.2
Common Fractions 1/6 - ANSWER 0.1666
Common Fractions 1/8 - ANSWER 0.125
Area of a circle formula - ANSWER A= πr²
Area of a square/rectangle - ANSWER A= bh
Perimeter of a rectangle - ANSWER P= 2(a+b)
Perimeter of a square - ANSWER P = 4s
perimeter of a circle - ANSWER P = 2πr
Basic Pythagorean Triple 1 - ANSWER (3, 4, 5), (5, 12, 13)
Basic Pythagorean Triple 2 - ANSWER (7, 24, 25), (8, 15, 17)
Basic Pythagorean Triple 3 - ANSWER (12, 35, 37), (20, 21, 29)
Basic Side angle ratio 1 - ANSWER 45°:45°:90° (x:x:x√2)
Basic Side angle ratio 2 - ANSWER 30°:60°:90° (x: x√3: 2x)
Rules for Odds and Evens - ANSWER odd ± even = odd
odd * odd = odd
everything else is even!
Common Fractions 9/16 - ANSWER 0.5625
Common Fractions 5/8 - ANSWER 0.625
Common Fractions 11/16 - ANSWER 0.6875
Common Fractions 3/4 - ANSWER 0.75
Common Fractions 13/16 - ANSWER 0.8125
Common Fractions 7/8 - ANSWER 0.875
Common Fractions 15/16 - ANSWER 0.9375
Common Fractions 1/3 - ANSWER 0.333
Common Fractions 1/5 - ANSWER 0.2
Common Fractions 1/6 - ANSWER 0.1666
Common Fractions 1/8 - ANSWER 0.125
