Directions : Given below is the sequence of series. Analyze the pattern of the…
2018
Directions : Given below is the sequence of series. Analyze the pattern of the series and answer the given following questions.
1, 3, 9, 31, 129, 651
2,_ ,__,___ , ____, ?
- A.
625
- B.
37
- C.
153
- D.
771
- E.
631
Attempted by 2 students.
Show answer & explanation
Correct answer: D
The pattern is multiply by 1 and add 2, multiply by 2 and add 3, multiply by 3 and add 4, and so on. Starting from 2 gives 4, 11, 37, 153, and 771. Therefore the missing final term is 771.