Question

If the steps of a number ladder from bottom to top have the numbers 6, 8, 10, 12, ... and so on, then the number in the eighth step of the ladder is .

• A. 24
• B. 18
• C. 22
• D. 20

Answer 1

The correct option is D 20

The numbers in the steps of the number ladder from bottom to top are 6, 8, 10, 12, ... and so on.

A number on a higher step is two more than the one on the step just below it.

This is because the numbers follow the following pattern:
$1^{\text{st}}$ step : 6
$2^{\text{nd}}$ step : 8
$3^{\text{rd}}$ step : 10
$4^{\text{th}}$ step : 12
$5^{\text{th}}$ step : 12 + 2 = 14
$6^{\text{th}}$ step : 14 + 2 = 16
$7^{\text{th}}$ step : 16 + 2 = 18
$8^{\text{th}}$ step : 18 + 2 = 20

Thus, the number on the $8^{\text{th}}$ step is 20.