Question Discussion & Solution

The series follows the following pattern:

12 × 2 - 1 = 23

23 × 2 - 1 = 45

45 × 2 - 1 = 89

89 × 2 - 1 = 177

177 × 2 - 1 = 353

The pattern followed in this question is:

2³ + 2 = 10

3³ + 2 = 29

4³ + 2 = 66

5³ + 2 = 127

6³ + 2 = 218

Given:

2, 10, 18, 54, 162, 486, 1458

Calculation:

The pattern of the number series is:

2 × 3 = 6 ≠ 10

6 × 3 = 18

18 × 3 = 54

54 × 3 = 162

∴ 10 is Wrong Number

The series follows the following pattern:

8

8 × 2 + 1 = 17

17 × 2 + 1 = 35

35 × 2 + 1 = 71

71 × 2 + 1 = 143

143 × 2 + 1 = 287

∴ The missing term in the series is 143.

Given series:

5, 15, 50, ?, 1030, 6185

Calculation:

The series is following the below pattern,

5 × 2 + 5 = 15

15 × 3 + 5 = 50

50 × 4 + 5 = 205

205 × 5 + 5 = 1030

1030 × 6 + 5 = 6185