Quantitative Aptitude Ques 761

Question: Directions: What will come in place of question mark (?) in the following number series? [CBI (PO) 2010]

15, 21, 39, 77, 143,?

Options:

A) 243

B) 240

C) 253

D) 245

E) None of these

Show Answer

Answer:

Correct Answer: D

Solution: