MathCounts Formulas

Front

What is the value of 2^5?

Back

32

Front

What is the formula for permutations P(n, r)?

Back

P(n, r) = \frac{n!}{(n-r)!}

Front

What is the formula for the area of a triangle?

Back

Area = \frac{1}{2}bh

Front

What is the formula for the sum of the first n natural numbers?

Back

1 + 2 + 3 + ... + n = \frac{n(n+1)}{2}

Front

What is the formula that relates distance, rate, and time?

Back

d = rt

Front

What is the value of 3^4?

Back

81

Front

What is the formula for combinations C(n, r)?

Back

C(n, r) = \frac{n!}{r!(n-r)!}

Front

What is the formula for the circumference of a circle?

Back

Circumference = 2\pi r

Front

What is the formula for the area of a rectangle?

Back

Area = l \times w

Front

What is the formula for the volume of a rectangular prism?

Back

Volume = l \times w \times h