Reasoning Quiz

Q1)-What will come in place of ?
21, 9, 21, 11, 21, 13, 21, ?

14

15

21

23

Ans.- B
In this alternating repetition series, the random number 21 is interpolated every other number into an otherwise simple addition series that increases by 2, beginning with the number 9.

Q2)-8, 22, 8, 28, 8,?

9

29

32

34

Ans.- D
This is a simple addition series with a random number, 8, interpolated as every other number. In the series, 6 is added to each number except 8, to arrive at the next number

Q3)-2, 3, 5, 7, 11, ?, 17

12

13

14

15

Ans.- B
Clearly, the given series consists of prime numbers starting from 2. The prime number after 11 is 13. So, 13 is the missing number.

Q4)-31, 29, 24, 22, 17,?

15

14

13

12

Ans.- A
This is a simple alternating subtraction series, which subtracts 2, then 5.

Q5)-1, 6, 13, 22, 33, ?

44

45

46

47

Ans.- C
The pattern is + 5, + 7, + 9, + 11,...
Missing number = 33 + 13 = 46.

Q6)-17, 32 ,19 ,29, 21, 26, 23,?

25, 25

20 ,22

23 ,25

25, 22

Ans.- C
Explanation: Here, there are two alternating patterns. The first begins with 17 and adds 2; the second begins with 32 and subtracts 3.

Q7)-1, 4, 9, 16, 25,?

36

38

49

52

Ans.- A
Series Pattern is +3, +5, +7, +9.
So next number = 25+11 = 36

Q8)-1,6,13,22,33,?

46

48

49

51

Ans.- A
Pattern is +5, +7, +9, +11
So next number will be +13
=> 33+13 = 46

Q9)-4, 7, 12, 19, 28, ?

49

36

30

39

Ans.- D

Q10)-2, 5, 9, ?, 20, 27

14

16

18

24

Ans.- A
The pattern is + 3, + 4,....
Missing number = 9 + 5 = 14.