Reasoning Quiz

Q1)-6, 11, 21, 36, 56, ... ?

81

83

95

105

Ans.- A
Pattern is +5, +10, +15, + 20. So next will be 56+25 = 81

Q2)-2, 3, 5, 7, 11, ?, 17

12

13

14

15

Ans.- B
Above series contains prime number series. So after 11, 13 is next prime number.

Q3)-3,6,8,16,18,?

28

36

54

34

Ans.- B
IInd number is twice of the first and fourth is twice of the third one. So 18 x 2 = 36

Q4)-6, 13, 25, 51, 101, ?

201

202

203

205

Ans.- C
The pattern is x 2 + 1, x 2 - 1, x 2 + 1, x 2 - 1,.....
So, missing term = 101 x 2 + 1 = 203.

Q5)-2, 1, 2, 4, 4, 5, 6, 7, 8, 8, 10, 11, ?

9

10

11

12

Ans.- B
The given sequence is a combination of three series :
I. 1st, 4th, 7th, 10th, 13th terms i.e. 2, 4, 6, 8, ?
II. 2nd, 5th, 8th, 11th terms i.e. 1, 4, 7, 10
III. 3rd, 6th, 9th, 12th terms i.e. 2, 5, 8, 11
Clearly, I consists of consecutive even numbers. So, the missing term is 10.

Q6)-Which of the following will not be a number of the series 1, 8, 27, 64, 125,.....?

256

512

729

1000

Ans.- A
The given series consists of cubes of natural numbers only. 256 is not the cube of any natural number.

Q7)-In the series 3, 9, 15.. what will be the 21st term ?

123

126

129

136

Ans.- A
We can judge that it is A.P.
With 6 as difference
nth term in A.P. = a+(n-1)d
a= 3, n = 21, d = 6
So, 21st term will be = 3+(20)6 = 123

Q8)-5, 9, 17, 29, 45, ... ?

58

64

65

80

Ans.- C
Pattern in the series is +4, +8, +12, +16.
Next term will be 45 + 20 = 65

Q9)-90, 180, 12, 50, 100, 200, ?, 3, 50, 4, 25, 2, 6, 30, 3

150

175

225

250

Ans.- A
Clearly, 90 = 30 x 3, 180 = 6 x 30, 12 = 2 x 6, 50 = 25 x 2, 100 = 4 x 25, 200 = 50 x 4.
So, missing term = 3 x 50 = 150.

Q10)-36, 34, 30, 28, 24, ..?

22

20

18

16

Ans.- A
Pattern in the series is, -2, -4, -2, -4. So next term will be -2
24 -2 = 22