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: