QUANTITATIVE APTITUDE: NUMBER SERIES QUIZ FOR IBPS PO, RRB, CLERK AND OTHER EXAM PART-2

Q.1 3245, ?, 1516, 1004, 661, 445
A. 2236
B. 2500
C. 2245
D. 2560
E. 2468



Q.2 32, 48, 75, 123, ?, 327
A. 201
B. 203
C. 210
D. 218
E. None of these

Q.3 20, 35, 80, 215, 620, ?
A. 1120
B. 1453
C. 1500
D. 1650
E. 1835

Q.4 3, 15, 35, ?, 99, 143
A. 61
B. 60
C. 63
D. 69
E. 70

Q.5 51, 68, 119, 204, ?, 476
A. 325
B. 323
C. 320
D. 326
E. 312

Answers:
Ans.1 C.
Ans.2 B.
Ans.3 E.
Ans.4 C.
Ans.5 B.

Explanation:
1. 
3245-10³ = 2245
2245-9³ = 1516
1516-8³ = 1004
1004-7³ = 661
661-6³ = 445

2.

3.
20+15 = 35
35+15×3 = 80
80+45×3 = 215
215+135×3 = 620
620+405×3 = 1835

4.
3 = 2²-1
15 = 4²-1
35 = 6²-1
63 = 8²-1
99 = 10²-1
143 = 12²-1

5.
51+17×1 = 68
68+17×3 = 119
119+17×5 = 204
204+17×7 = 323
323+17×9 = 476