Missing Numbers Quiz Set 040

Question 1

Directions: One number is missing in the series. You have to understand the pattern of the series and then insert the missing number.

121, 112, ?, 97, 91, 86

A

102

B

108

C

99

D

104

Soln.
Ans: d

Series is written in descending order with a difference of 9, 8, 7, 6 and 5, respectively. Hence, the missing number will be 104.

Question 2

What is missing?

A

S10

B

3X

C

U4

D

6U

Soln.
Ans: b

3X. Letters move from mumerator to denominator, and have gaps of -1, -2, -3, -4, -5 and -6 that is D (E) F (GH) I (JKL) M (NOPQ) R (STUVW) X. The numbers are their position numbers backwards, that is D = 23, F = 21, I = 18, M = 14, R = 9, X = 3.

Question 3

One number is wrong in the series. Find the wrong number.

376, 188, 88, 40, 16, 4, −2

A

4

B

16

C

40

D

188

Soln.
Ans: d

Series has been written in descending order with a differences of 192, 96, 48, 24, 12, 6 respectively. Hence, the number 188 should be replaced by 184. So 188 is wrong.

Question 4

A

36.

B

38.

C

40.

D

42.

Soln.
Ans: c

The sequence is as follows : 12(+1), 13 (+2), 15(+3), 18(+4), 22(+5), 27(+6), 33(+7), 40 so on.

Question 5

Directions : One number is wrong in the series. Find out the wrong number.

3, 6, 9, 22.5, 67.5, 236.25, 945

A

6

B

9

C

22.5

D

67.5

Soln.
Ans: a

Pattern of the series is :

3 × 1.5 = 4.5, 4.5 × 2 = 9, 9 × 2.5 =22.5, 22.5 × 3 = 67.5, 67.5 × 3.5 = 236.5 . . . .

Therefore, number 6 should be replaced by 4.5 .