Missing Numbers Quiz Set 017

Question 1

6, 11, 21, 36, 56, (?)

A

51.

B

42.

C

81.

D

91.

Soln.
Ans: c

6 (+5), 11 (+10), 21 (+15), 36 (+20), 56 (+25), 81.

Question 2

17, 19, 23, 29, (?), 37.

A

31.

B

33.

C

35.

D

36.

Soln.
Ans: a

17, 19, 23, 29, 31, 37. This series is of prime numbers whose first term is 17 and the last term is 37.

Question 3

A

8.

B

9.

C

10.

D

11.

Soln.
Ans: d

3 x 4 - 8 = 4, 2 x 5 - 4 = 6 ∴ 4 x 5 - 9 = 11.

Question 4

What is missing?

A

13P

B

15Q

C

U6

D

6U

Soln.
Ans: c

U6. The vowels move from the numerator to the denominator. The numbers are their respective positions in the backward sequence of alphabets, that is Z = 1, A = 26, E = 22, I = 18, O = 12, U = 6.

Question 5

In the following number series, one of the numbers does not fit into the series. Find the wrong number.

49, 56, 64, 71, 81, 90, 100, 110

A

56

B

64

C

71

D

81

Soln.
Ans: c

The series is: 7 X 7, 7 X 8, 8 X 8, 8 X 9, 9 x 9, 9 X 10, 10 X 10, 10 X 11, so instead of 71 we should have 72.