ACT Math: Key Formulas and Concepts for Numbers, Sequences, Geometry,
and Probability. Exam Questions and Correct Answers With 100% Correct
Answers | Latest 2026 |
Integers - . . . , -3, -2, -1, 0, 1, 2, 3, . . .
Rationals - Fractions, that is, anything expressible as a ratio of integers.
Real numbers - Integers plus rationals plus special numbers such as √.
Order Of Operations - PEMDAS (Parentheses / Exponents / Multiply / Divide / Add /
Subtract)
Arithmetic Sequences - Each term is equal to the previous term plus d.
Geometric Sequences - Each term is equal to the previous term times r.
Factors - The factors of a number divide into that number without a remainder.
Multiples - The multiples of a number are divisible by that number without a remainder.
Percents - Use the formula part = percent/100 × whole.
Average - Average = sum of terms / number of terms.
Average Speed - Average speed = total distance / total time.
and Probability. Exam Questions and Correct Answers With 100% Correct
Answers | Latest 2026 |
Integers - . . . , -3, -2, -1, 0, 1, 2, 3, . . .
Rationals - Fractions, that is, anything expressible as a ratio of integers.
Real numbers - Integers plus rationals plus special numbers such as √.
Order Of Operations - PEMDAS (Parentheses / Exponents / Multiply / Divide / Add /
Subtract)
Arithmetic Sequences - Each term is equal to the previous term plus d.
Geometric Sequences - Each term is equal to the previous term times r.
Factors - The factors of a number divide into that number without a remainder.
Multiples - The multiples of a number are divisible by that number without a remainder.
Percents - Use the formula part = percent/100 × whole.
Average - Average = sum of terms / number of terms.
Average Speed - Average speed = total distance / total time.
