Hello Aspirants. Welcome to Online Quantitative Aptitude Section in AffairsCloud.com. Here we are creating question sample in Number Series, which is common for all the competitive exams. We have included Some questions that are repeatedly asked in bank exams !!!
- 686, 438, 314, 252, 221, ?
A) 180
B) 187.5
C) 201
D) 205.5
E) 175.5
Answer & Explanation
D) 205.5
Explanation:
686 – 248 = 438
438 – (248/2) = 438 – 124 = 314
314 – (124/2) = 314 – 62 = 252
252 – (62/2) = 252 – 31 = 221 - 427, 85.4, 34.16, 20.496, ?
A) 14.3782
B) 16.2902
C) 16.3968
D) 20.3984
E) 11.6248
Answer & Explanation
C) 16.3968
Explanation:
*0.2, *0.4, *0.6, *0.8 - 6, 6, 4, 8, 3.2, 9.6, ?
A) 5.4
B) 2.8
C) 2.5
D) 4.1
E) None of these
Answer & Explanation
B) 2.8
Explanation:
*1, ÷1.5, *2, ÷2.5, *3, ÷3.5 - 4.2, 2.6, 2.1, 1.3, 1.05, 0.65, 0.525, ?
A) 0.315
B) 0.325
C) 0.435
D) 0.465
E) 0.535
Answer & Explanation
B) 0.325
Explanation:
It is a double series:
÷0.5 :– 4.2, 2.1, 1.05, 0.525
÷0.5 :– 2.6, 1.3, 0.65, ? - 5, 9, 36, 208, 1398, ?
A) 7392
B) 14378
C) 12542
D) 6448
E) 11472
Answer & Explanation
E) 11472
Explanation:
[5+22] × 1 = 9
[9+32] × 2 = 36
[36+42] × 4 = 208
[208+52] × 6 = 1398
[1398+62] × 8 = 11472
- 4, 3, 12, 6, 36, 9, 108, 12, ?
A) 324
B) 252
C) 156
D) 182
E) 236
Answer & Explanation
A) 324
Explanation:
It is a double series.
*3 :– 4, 12, 36, 108
+3 :– 3, 6, 9, 12 - 2, 7, 29, 85, 192, ?
A) 385
B) 213
C) 264
D) 367
E) None of these
Answer & Explanation
D) 367
Explanation:
It is a double difference series:
7-2 = 5, 29-7 = 22, 85-29 = 56, 192-85 = 107
22-5 = 17, 56-22 = 34, 107-56 = 51
So next [(51+17)+107]+192 - 15, 27, 44, 66, 93, ?
A) 136
B) 125
C) 154
D) 165
E) 193
Answer & Explanation
B) 125
Explanation:
15 + 12 = 27
27 + (12+5) = 27 + 17 = 44
44 + (17+5) = 44 + 22 = 66
66 + (22+5) = 93 - 120, 170, 224, 280, 360, ?
A) 392
B) 442
C) 458
D) 528
E) 540
Answer & Explanation
B) 442
Explanation:
11^2 – 1 = 120
13^2 + 1 = 170
15^2 – 1 = 224
17^2 + 1 = 280
19^2 – 1 = 360
21^2 + 1 = 442 - 9, 9, 18, 54, 162, 324, ?
A) 428
B) 404
C) 386
D) 422
E) None of these
Answer & Explanation
E) None of these
Explanation:
*1, *2, *3, *3, *2, *1
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