# Quantitative Aptitude: Number Series Set 20

Directions: What will come in place of (?) in the following number series?

1. 3, 7, 12.2, 19.8, 31, ?
A) 65.5
B) 47
C) 56
D) 44.4
E) 56.5
Option B
Pattern:
3â€¦â€¦â€¦â€¦7â€¦â€¦â€¦…12.2â€¦â€¦â€¦â€¦..19.8â€¦â€¦â€¦â€¦..31â€¦â€¦â€¦â€¦.47
â€¦â€¦+4 +5.2Â Â Â Â Â Â Â Â Â Â Â  +7.6â€¦â€¦â€¦â€¦â€¦.+11.2â€¦â€¦â€¦+16
â€¦â€¦â€¦..+1.2Â Â Â Â Â  Â Â Â Â Â +2.4Â Â Â Â Â Â Â Â Â Â  +3.6Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â  Â +4.8
2. 5, 17, 34, 41, 63, ?
A) 79
B) 74
C) 72
D) 68
E) 65
Option E
Pattern:
5â€¦â€¦â€¦â€¦.17â€¦â€¦â€¦34â€¦â€¦â€¦41â€¦â€¦â€¦â€¦.63â€¦â€¦â€¦..65
â€¦â€¦.+12Â Â Â Â Â Â Â  +17Â Â Â Â Â Â  +7Â Â Â Â Â Â Â Â Â  +22Â Â Â Â Â Â Â  Â Â Â Â 2
.Â Â Â Â Â  Â Â Â Â Â Â Â +5Â Â Â Â Â Â Â  Â -10Â Â Â Â Â Â  +15Â Â Â Â Â Â Â Â Â Â  -20
3. 6, 3, 5, 14, 64, ?
A) 472
B) 506
C) 528
D) 420
E) 588
Option C
Pattern:
6Ã—0.5 + 0 = 3
3Ã—1 + 2 = 5
5Ã—2 + 4 = 14
14Ã—4 + 8 = 64
64Ã—8 + 16 = 528
4. 6, 7, 12, 39, 152, ?
A) 765
B) 823
C) 685
D) 515
E) 845
Option A
Pattern:
*1 + 1, *2 – 2, *3 + 3, *4 – 4, *5 + 5
5. 3, 12, 55, 216, 645, ?
A) 1355
B) 1502
C) 1406
D) 1288
E) 1429
Option D
Pattern:
*6 â€“ 6, *5 â€“ 5, *4 â€“ 4, *3 â€“ 3, *2 â€“ 2
6. 6, 12, 22, 41, 76, ?
A) 126
B) 136
C) 167
D) 142
E) 132
Option B
Pattern:
6â€¦â€¦â€¦. 12â€¦â€¦â€¦.. 22â€¦â€¦â€¦â€¦. 41â€¦â€¦â€¦. 76â€¦â€¦â€¦.. 136
. +6Â Â Â Â Â Â Â Â Â Â Â  +10Â Â Â Â Â Â Â  Â +19Â Â Â Â Â Â  Â +35Â  Â Â Â Â Â Â Â Â +60
.Â Â Â Â Â Â Â Â Â Â  +22Â Â Â Â Â Â Â Â  Â Â +32Â Â  Â Â Â Â Â Â +42Â Â Â  Â Â Â Â Â Â +52
7. 6, 4, 5, 11, ?, 189
A) 49
B) 43
C) 39
D) 57
E) 52
Option C
Pattern:
6*1 – 2, 4*2 – 3, 5*3 – 4, 11*4 – 5, 39*5 – 6
8. 5, 1, 3, 9, 31, ?
A) 104
B) 136
C) 154
D) 129
E) 144
Option D
Pattern:
Ã—0+ 1, Ã—1 + 2, Â Ã—2 + 3, Â Ã—3 + 4, Ã—4 + 5
9. 5, 7, 25, 131, 925, ?
A) 8335
B) 7340
C) 6460
D) 7520
E) 9420
Option A
Pattern:
Ã—1 + 2, Ã—3 + 4, Ã—5 + 6, Ã—7 + 8, Ã—9 + 10.
10. 4, 9, 20, 43, ?, 185
A) 82
B) 90
C) 73
D) 62
E) 96
Option B
Pattern:
4Ã—2 + 1 = 9,
9Ã—2 + 2 = 20,
20Ã—2 + 3 = 43,
43Ã—2 + 4 = 90,
90Ã—2 + 5 = 185 Â

## 8 Thoughts to “Quantitative Aptitude: Number Series Set 20”

1. Jellyfish

9/10 ty

1. Eku

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ty

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