GMAT Maths Arithmetic - Consecutive Numbers

Consecutive integers are integers listed in numerical order that differ by 1. An example of three consecutive
integers is 3, 4, and 5, or –11, –10, and –9. Consecutive even integers are numbers like 10, 12, and 14 or –22,
–20, and –18. Consecutive odd integers are numbers like 7, 9, and 11.When they are used in word problems,
it is often useful to define them as x, x + 1, x + 2, and so on for regular consecutive integers and x, x + 2, and
x + 4 for even or odd consecutive integers. Note that both even and odd consecutive integers have the same
algebraic representation.