Geometry
Area of a square
What is s^2?
Sum of first n terms
What is n(n+1)/2?
Cards in a deck
What is 52?
Sine formula
What is opposite over hypotenuse?
Number of feet in a mile
What is 5280?
Sum of measures of external angles in an n-gon
What is 360◦?
Sum of first n odd terms
What is n^2?
Permutations Formula
What is n!/(n-r)! ?
Cotangent formula
what is adjacent over opposite or one over tangent?
Number of oz in a pound
What is 16?
Diagonals in an n-gon
What is n(n−3)/2 ?
Sum of first n even terms
What is n(n + 1) ?
Probability of flipping a coin and landing on heads 4 consecutive times
What is 1/16?
Tangent of 30 degrees
what is sqrt(3)/3?
Metric prefix for 10^2
What is hecto-?
Heron's Formula-- Area of a Triangle
A = sqrt( s(s − a)(s − b)(s − c))
Sum of infinite geometric series
What is a1/(1-r) ?
Combinations Formula
What is n!/r!(n-r)!
Cosine of 60 degrees
What is 1/2?
Number of teaspoons in a tablespoon
What is 3?
Edges on a dodecahedron
What is 30?
The capital of Romania
What is Bucharest?
Probability of rolling a sum s on two dice when s<=7
What is (s-1)/36 ?
Law of Cosines
What is c^2 = a^2 + b^2 − 2ab cos C ?
Number of cm per inch
What is 2.54