# Quantitative Aptitude: Number Series Set 58 (IBPS PO 2017 Mains Based)

Questions 1-4 were asked in exam, 5-10 are based on it.

Directions: The following series are based on a certain pattern. One of the number in series is wrong. Find that odd one out.

1. 9, 5, 6, 10.5, 24, 60, 183
A) 5

B) 6
C) 10.5
D) 24
E) 60
Â  Option D
Pattern
:
*0.5 + 0.5, * 1+ 1, *1.5 + 1.5, *2 + 2, *2.5 + 2.5, *3 + 3
S0, 10.5*2 + 2 = 23
2. 55, 272, 398, 463, 491, 498, 502
A) 272

B) 398
C) 463
D) 491
E) 498
Â  Option E
Pattern
:
+ (63+1), + (53+1), + (43+1), + (33+1), +(23+1), + (13+1)
So, 491 + (23+1) = 500
3. 196, 194, 198, 190, 206, 172, 238
A) 194

B) 198
C) 190
D) 206
E) 172
Â  Option E
Pattern
:
-2, +4, -8, +16, -32, +64
So, 206 – 32 = 174
4. 1, 2, 6, 21, 88, 450, 2676
A) 2

B) 6
C) 21
D) 88
E) 450
Â  Option E
Pattern
:
*1 + 1, 82 + 2, *3 + 3, *4 + 4, *5 + 5, *6 + 6
So, 88*5 + 5 = 445
5. 125, 128, 122, 134, 112, 158, 62
A) 128

B) 122
C) 134
D) 112
E) 158
Â  Option D
Pattern
:
+3, -6, +12, -24, +48, -96
So, 134 – 24 = 110
6. 4, 5, 8, 27, 102, 525, 3144
A) 5

B) 8
C) 27
D) 102
E) 525
Â  Option D
Pattern
:
*1 + 1, *2 – 2, *3 + 3, *4 – 4, *5 + 5, *6 – 6
So, 27*4 – 4 = 104
7. 3, 7, 16, 35, 73, 133, 222
A) 7

B) 16
C) 35
D) 73
E) 133
Â  Option C
Pattern
:
……..+4…….+9…….+20…….+37…….+60…….+89…..
.Â  Â  Â  Â  Â  Â  Â  +5……+11……..+17……..+23…….+29
.Â  Â  Â  Â  Â  Â  Â  Â  Â  Â +6……..+6………+6……….+6
So, 16+30 = 36
8. 37, 72, 96, 111, 119, 121, 122
A) 72

B) 96
C) 111
D) 119
E) 121
Â  Option E
Pattern
:
+ (62-1), + (52-1), + (42-1), + (32-1), +(22-1), + (12-1)
So, 119 +(22-1)Â = 122
9. 21, 10, 9, 14, 22, 52.5, 154.5
A) 10

B) 9
C) 14
D) 22
E) 52.5
Â  Option C
Pattern
:
*0.5 – 0.5, *1 – 1, *1.5 – 1.5, *2 – 2, *2.5 – 2.5, *3 – 3
So, 9*1.5 – 1.5 = 12
10. 45, 46, 54, 81, 145, 174, 206
A) 46

B) 54
C) 81
D) 145
E) 174
Â  Option E
Pattern
:
+12, +23, +32, +43, +52, +63
So, 145+52Â Â = 170

## 3 Thoughts to “Quantitative Aptitude: Number Series Set 58 (IBPS PO 2017 Mains Based)”

1. Nishu

check Q5

1. Whats the error ?

1. Nishu

Oh nothing wrong, I forgot for a moment that these are wrong number series ðŸ™‚