ACT Math Review

Front

What is the formula to calculate the average of a set of numbers?

Back

Average = (Sum of all numbers) / (Total count of numbers)

Front

How do you determine if a number is a multiple of another number?

Back

A number A is a multiple of B if A = B * n, where n is an integer.

Front

What is a perfect square?

Back

A perfect square is an integer that is the square of an integer.

Front

What does it mean when numbers and letters are 'pushed together' in math?

Back

It means to multiply the numbers and variables.

Front

How do you add fractions with different denominators?

Back

Find a common denominator, convert the fractions, then add the numerators.

Front

What is the least common multiple (LCM) of two numbers?

Back

The smallest number that is a multiple of both numbers.

Front

What is the greatest common divisor (GCD) of two numbers?

Back

The largest number that divides both numbers without leaving a remainder.

Front

What is the formula for the area of a rectangle?

Back

Area = length × width.

Front

What is the Pythagorean theorem?

Back

In a right triangle, a² + b² = c², where c is the hypotenuse.

Front

How do you convert a fraction to a decimal?

Back

Divide the numerator by the denominator.