Question

The pattern formed by all even numbers is represented by the expression

• A. 2n + 1
• B. 2n - 1
• C. n
• D. 2n

Answer 1

The correct option is D 2n

Even numbers are divisible by 2.
So, all even numbers can be represented by $2\times n$; where n represents whole numbers 0, 1, 2, ...

[By substituting $n=0,1,2,...$ in $2n$, we get the set of all even numbers, which is, {0,2,4,6,....}].