Practice MCQ Questions and Answer on Series Completion

71.

One term in the number series is wrong. Find out the wrong term.
10, 26, 74, 218, 654, 1946, 5834

(A) 26
(B) 74
(C) 218
(D) 654

Solution:

 The correct pattern is x 3 - 4. So, 654 is wrong and must be replaced by (218 x 3 - 4) i.e. 650.

72.

2, 2, 5,13, 28, ?

(A) 49
(B) 50
(C) 51
(D) 52

Solution:

 The pattern is + 0, + 3, + 8, + 15, ..... i.e. + (l2 - 1), + (22 - 1), + (32 - 1), + (42 - 1), ..... So, missing term = 28 + (52 - 1) = 28 + 24 = 52.

73.

Choose the correct order of the given alternative : SHG, RIF, QJE, PKD, ?____________________

(A) NME
(B) NLB
(C) OLE
(D) OLC

Solution:

 S - 1 = R - 1 = Q - 1 = P - 1 = OH + 1 = I + 1 = J + 1 = K + 1 = LG - 1 = F - 1 = E - 1 = D - 1 = C OLC is the answer.

74.

6, 12, 21, ?, 48

(A) 33
(B) 38
(C) 40
(D) 45

Solution:

 The pattern is + 6, + 9, + 12, + 15, ..... So, missing term = 21 + 12 = 33.

75.

Choose the missing terms out of the given alternatives.
AI, BJ, CK, ?

(A) DL
(B) DM
(C) GH
(D) LM

76.

One term in the number series is wrong. Find out the wrong term.
16, 22, 30, 45, 52, 66

(A) 30
(B) 45
(C) 52
(D) 66

Solution:

 The correct pattern is + 6, + 8, + 10, + 12, + 14. So, 45 is wrong and must be replaced by (30 + 10) i.e. 40.

77.

Choose the missing terms out of the given alternatives : B, D, F, I, L, P, ?

(A) R
(B) S
(C) T
(D) U

Solution:

 B + 2 D + 2 F + 3 I + 3 L + 4 P + 4 T

78.

Choose the missing terms out of the given alternatives : AZ , CX , FU , ?

(A) IR
(B) IV
(C) JQ
(D) KP

Solution:

 1st letter : A + 2 = C + 3 = F + 4 = J 2nd letter : Z - 2 = X - 3 = U - 4 = J

79.

One term in the number series is wrong. Find out the wrong term.
196, 169, 144, 121, 101

(A) 101
(B) 121
(C) 169
(D) 196

Solution:

 The sequence is (14)2, (13)2, (12)2, (11)2, (10)2. So, 101 is wrong and must be replaced by (10)2 i.e. 100.

80.

11, 13, 17, 19, 23, 25, ?

(A) 26
(B) 27
(C) 29
(D) 37

Solution:

 The pattern is + 2, + 4, + 2, + 4, ..... So, missing term = 25 + 4 = 29.

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Practice MCQ Questions and Answer on Series Completion

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