What are some common math formulas needed to know for the ACT?
You don’t need to know any formulas for any section of the ACT, including the science section too. As a matter of fact, you don’t even need a calculator. However, there are some concepts you should remember, such as how to algebraically represent consecutive numbers. Here’s a sample question I just made up: What three CONSECUTIVE INTEGERS add up to make 36? Any arbitrary number can be represented by the variable ‘n’. If the numbers are consecutive, then the next number would be (n + 1), and the next number would be [(n + 1) + 1]. n + (n + 1) + [(n + 1) + 1] = 36 3n + 3 = 36 3n = 33 n = 11 Plugging ‘n’ back into the original expression: n + (n + 1) + [(n + 1) + 1] = 36 11 + 12 + 13 = 36 Also, you may want to review a LOT of geometry. Pythagorean’s theorem, triangles and circles. You MUST know how to interpret word problems with algebra. You MUST know how to solve systems of linear equations. You MUST know how to manipulate algebraic expressions; to do this, you might want to brush up on
