Direction: Directions : What will come in the place of question mark (?) in the following number.
-
16, ?, 21, 30, 46, 71, 107
-
- 17
- 19
- 21
- 23
- 25
Correct Option: A
The given series is in the below pattern,
First term = 16
Second term = First term + 12
⇒ Second term = 16 + 12 = 17
∴ ? = 17
Third term = Second term + 22
⇒ Third term = 17 + 22 = 21
Fourth term = Third term + 32
⇒ Fourth term = 21 + 32 = 30 ;
Fifth term = Fourth term + 42
⇒ Fifth term = 30 + 42 = 46 ;
Similarly , we can find all others terms also.
Sixth term = Fifth term + 52
⇒ Sixth term = 46 + 52 = 71;
Seventh term = Sixth term + 62
⇒ Sixth term = 71 + 62 = 107
Hence , Second term = 17