# Quantitative Aptitude: Number Series 34

Quantitative Aptitude Questions for IBPS RRB/PO/Clerk, SBI PO, NIACL, NICL, RBI Grade B/Assistant, UIICL, OICL and other competitive exams.

Directions(1-5): What should come in place of the question mark (?) in the following number series?

1. 3     732      1244      1587      1803      1928      ?
A) 2010
B) 1992
C) 1781
D) 1550
E) 1227
Option B
Solution:
732   –   3 = 729 = 9^3
1244 – 732  = 512 = 8^3
1587 – 1244 = 343 = 7^3
1803 – 1587 = 216 = 6^3
1928 – 1803 = 125 = 5^3
1928 + 4^3 = 1928 + 64 = 1992
2. 8     11     17     ?     65     165.5      498.5
A) 21.1
B) 28.8
C) 32
D) 30.5
E)  27.5
Option D
Solution:
8 * 0.5 + 7 = 4 + 7 = 11
11 * 1 + 6 = 17
17  *  1.5  + 5 = 30.5
30.5 * 2 + 4 = 61 + 4 = 65
3. 5     12     36     123       ?       2555      15342
A) 508
B) 415
C) 510
D) 488
E) 498
Option  A
Solution:
5 * 1 + 1 * 7 = 12
12 * 2 + 2 * 6 = 36
36 * 3 + 3 * 5 = 123
123 * 4 + 4 * 4 = 508
508 * 5 + 5 * 3 = 2555
4. 4.5       ?       25.5       33         38.5         42       43.5
A) 10
B) 22
C) 20
D) 18
E) 16
Option E
Solution:
4.5 + 11.5  = 16
16  + 9.5 = 25.5
25.5 + 7.5 = 33
33 + 5.5 = 38.5
5. 1     2    6     21      88   445    ?
A) 1908
B) 2676
C) 2150
D) 1500
E) 1880
Option B
Solution:
1 * 1 + 1 = 2
2 * 2 + 2 = 6
6 * 3 + 3 = 21
21 * 4 + 4 = 88
88 * 5 + 5 = 445
445 * 6 + 6 = 2676

Directions(6-10)
: In each questions below, a number series is given in which one number is wrong. Find out the wrong number.

1. 13       13       65        585      7605     129285
A) 129285
B) 585
C)  13
D) 65
E) 7605
Option C
Solution:
13  * 1 = 13
13 * 5 = 65
65 * 9 = 585
585 * 13 = 7605
7605 * 17 = 129285
2. 1331       2197       3370      4914       6859
A)  2197
B) 1331
C) 3370
D) 4914
E) 6859
Option C
Solution:
11 * 11 * 11 = 1331
13 * 13 * 13 = 2197
15 * 15 * 15 = 3375
17 * 17 * 17 = 4914
19 * 19 * 19 = 6859
3. 4       210         369       513        634       734
A) 447
B) 330
C) 215
D) 200
E) 450
Option D
Solution:
4 + 14^2 = 4 + 196 = 200
200 + 13^2 = 200 + 169 = 369
369 + 12^2 = 369 + 144 = 513
513 +11^2 = 634 + 121 = 634
634 + 10^2 = 634 + 100 = 734
4. 4       11     24      53       109    221
A) 25
B) 4
C) 53
D) 11
E) 109
Option  A
Solution:
4 + 1 * 7 = 11
11 + 2 * 7 = 25
25 + 4 * 7 = 53
53 + 8 *7 = 109
109 + 16 * 7 = 221
5. 15     18    15    19     17       20
A) 20
B) 16
C) 19
D) 18
E) 17
Option B
Solution:
15 + 3 = 18
18 – 2 = 16
16 + 3 = 19
19 – 2 = 17
17  + 3 = 20

## 6 Thoughts to “Quantitative Aptitude: Number Series 34”

1. chinnu

thnku

2. ****

ty…))

3. _/_

ty
Excellent quiz BANYA MAM

4. ครђ

Thanks Banya ma’am 🙂

5. jaga

thank u mam

6. 'Sita'

10th one ans 18 na ??