Series Set – 17

1. 2, 7, 29, 109, 319, ?
A) 724
B) 704
C) 629
D) 835
E) 853

Answer & Explanation

 Option C
Pattern:
2 × 6 – 5 = 7,
7 × 5 – 6 = 29,
29 × 4 – 7 = 109,
109 × 3 – 8 = 319,
319 × 2 – 9 = 629

 

2. 729, 243, 162, 162, 216, ?
A) 555
B) 456
C) 782
D) 360
E) 685

Answer & Explanation

 Option D
Pattern: 
× 1/3, × 2/3, × 3/3, × 4/3, × 5/3

 

3. 216, 95, 176, 127, 152, ?
A) 112
B) 101
C) 143
D) 120
E) 132

Answer & Explanation

 Option C
Pattern:
-112, + 92, -72, +52, -32

 

4. 3, 3, 7, 25, 73, ?
A) 155
B) 173
C) 135
D) 196
E) 185

Answer & Explanation

 Option B
Pattern:
3 + (12 * 0) = 3
3 + (22 * 1) = 7
7 + (32 * 2) = 25
25 + (42 * 3) = 73
73 + (52 * 4) = 173  

 

5. 16, 20, 39, 83, ?, 286
A) 195
B) 190
C) 140
D) 158
E) 162

Answer & Explanation

 Option E
Pattern:
16………. 20……….. 39…………. 83………. 162……….. 286
.    +4          +19           +44            +79          +124
.           +15          +25           +35          +45

 

6. 16, 20, 34, 28, 52, ?
A) 36
B) 45
C) 67
D) 84
E) 72

Answer & Explanation

 Option A
Pattern:
16………. 20……….. 34…………. 28………. 52……….. 36
.    +4           +14           -6              +24             -16
.           +10          -20          +30             -40

 

7. 26, 20, 37, 29, 48, 38, ?
A) 62
B) 59
C) 71
D) 54
E) 75

Answer & Explanation

 Option B
Pattern:
Two series
26 + 11 = 37, 37+11 = 48, 48+11 = 59
20+9 = 29, 29+9 = 38

 

8. 33, 37, 28, 44, 19, ?
A) 66
B) 59
C) 34
D) 42
E) 55

Answer & Explanation

 Option E
Pattern:
+22, -32, +42, -52, +62 

 

9. 8, 20, 56, 164, 488, ?
A) 1387
B) 1345
C) 1460
D) 1430
E) 1428

Answer & Explanation

 Option C
Pattern:
*3 – 4, *3 – 4, *3 – 4,  *3 – 4,  *3 – 4  

 

10. 4, 10, 14, 48, 186, ?
A) 570
B) 688
C) 753
D) 862
E) 936

Answer & Explanation

 Option E
Pattern:
4 × 1 + 6 = 10,
10 × 2 – 6 = 14,
14 × 3 + 6 = 48,
48 × 4 – 6 = 186,
186 × 5 + 6 = 936   

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