Reasoning-: Number Series-DECE Job Entrance/RRB Group D

Pattern of the series is as follows :

⇒ 2 × 3 = 6

⇒ 3 × 4 = 12

⇒ 4 × 5 = 20

⇒ 5 × 6 = 30 ≠ 32

⇒ 6 × 7 = 42

⇒ 7 × 8 = 56

⇒ 8 × 9 = 72

∴ 30 is correct answer in place of 32.

The logic is:

Hence, ‘1.56’ is the correct answer.

Logic: Add the previous term in the current term to get the next term of the series.

The relation among given numbers is:

First term is : 9

13 + 9 = 22;

22 + 13 = 35;

35 + 22 = 57;

57 + 35 = 92;

92 + 57 = 149.

Hence,35 will complete the series.

The pattern followed here is:

9 × 6 = 54

54 × 8 = 432

432 × 10 = 4320

4320 × 12 = 51840

In place of 4328, there should be 4320.

Hence, the answer is ‘4328’.

The logic followed here is:

Hence, the correct answer is ” 2642 “.

Given,

5, 9, 10, 28, 17, 65, ?

The pattern followed here is,

Hence, the correct answer is 26.

The logic is:

Hence, ‘6.4’ is the correct answer.

The following series, is a combination of two series, i.e. 4, 12, 18 and 8, 24, ?

In 4, 12, 18;

4 × 3 = 12;

12 × 1.5 = 18;

Similarly in series 8, 24, ?

8 × 3 = 24;

24 × 1.5 = 36

Hence the next number in the series is 36.

Given,

88, 95, 106, 119, 136, 155, 178, ?

The pattern followed here is,

Addition of prime numbers in numbers, (7, 11, 13, 17, 19, 23)

88 + 7 = 95

95 + 11 = 106

106 + 13 = 119

119 + 17 = 136

136 + 19 = 155

155 + 23 = 178

178 + 29 = 207

Here, we see addition of consecutive prime number in each term.

Hence, the correct answer is 207.