Series Set – 11

1. 6, 7, 16, 51, 208, ?
A) 1081
B) 1159
C) 1066
D) 1045
E) 1160

Answer & Explanation

 Option D
Pattern:
*1 + 1, *2 + 2, *3 + 3, *4 + 4, *5 + 5.

 

2. 102, 79, 66, 47, 38, ?
A) 41
B) 39
C) 23
D) 12
E) 40

Answer & Explanation

 Option C
Pattern:  
10^2 + 2, 9^2 – 2, 8^2 + 2, 7^2 – 2, 6^2 + 2, 5^2 – 2

 

3. 3, 5, 21, 115, 819,
A) 7481
B) 7389
C) 7166
D) 7245
E) 7160

Answer & Explanation

 Option B
Pattern:
*1 + 2, *3 + 6, *5 + 10, *7 + 14, *9 + 18

 

4. 26, 13, 20, 51, 180,
A) 812
B) 659
C) 866
D) 745
E) 760

Answer & Explanation

 Option A
Pattern:
*0.5 + 0, *1.5 + 0.5, *2.5 + 1, *3.5 + 1.5, *4.5 + 2

 

5. 223, 167, 119, 79, 47, ?
A) 31
B) 29
C) 26
D) 35
E) 23

Answer & Explanation

 Option E
Pattern:
15^2 – 2 = 223, 13^2 – 2 = 167, 11^2 – 2 = 119, 9^2 – 2 = 79, 7^2 – 2 = 47, 5^2 – 2 = 23

 

6. 2, 15, 42, 97, 208, ?
A) 381
B) 459
C) 431
D) 445
E) 360

Answer & Explanation

 Option C
Pattern:
2*2 + 11, 15*2 + 12, 42*2 + 13, 97*2 + 14, 208*2 + 15

 

7. 3, 4, 15, 56, 285, ?
A) 1681
B) 1759
C) 1666
D) 1704
E) 1660

Answer & Explanation

 Option D
Pattern:
*2 – 2, *3 + 3, *4 – 4, *5 + 5, *6 – 6

 

8. 16, 8, 6, 7, 14.5,
A) 50.75
B) 61.55
C) 58.25
D) 70.45
E) 51.60

Answer & Explanation

 Option C
Pattern:
*0.25  + 4, *0.5  + 2, *1  + 1, *2  + 0.5, *4 + 0.25

 

9. 1, 3, 10, 38, 168, ?
A) 881
B) 872
C) 866
D) 845
E) 860

Answer & Explanation

 Option B
Pattern:
*1 + 2, *2 + 4, *3 + 8, *4 + 16, *5 + 32

 

10. 2, 8, 15, 26, 46, ?
A) 88
B) 79
C) 66
D) 75
E) 82

Answer & Explanation

 Option E
Pattern:

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