Question

What will come in place of the question mark (?) in each of the following series?

7, 10.5, 21, 52.5, 157.5, ?

• A. 340.75
• B. 495.5
• C. 551.25
• D. 427.25
• E. 339

Answer 1

The correct option is C 551.25

The pattern followed here is (preceding term) $\times$ 1.5, $\times$ 2, $\times$ 2.5, $\times$ 3, $\times$ 3.5……