Odd and Even Numbers on the SAT Exam

On the SAT exam, there are often questions that ask whether the sum or product of two numbers will be even or odd. It is possible to predict whether the sum or product of two numbers will be odd or even based on the following rules:

•Addition Rules

–Even + Even = Even

–Odd + Odd = Odd

–Odd + Even = Odd

•Multiplication Rules

–Even x Even = Even

–Odd x Odd = Odd

–Even x Odd = Even

•You can confirm any of the above relationships by picking odd and even numbers and testing the formulas given.