Practice MCQ Questions and Answer on Series Completion

31.

48, 24, 96, 48, 192, ?

• (A) 76
• (B) 90
• (C) 96
• (D) 98

Show Answer

 The pattern is ÷ 2, x 4, ÷ 2, x 4, ..... So, missing term = 192 ÷ 2 = 96.

32.

Choose the missing terms out of the given alternatives : 2B, 4C, 8E, 14H, ?

• (A) 16K
• (B) 20I
• (C) 20L
• (D) 22L

Show Answer

 Numbers : 2 + 2 = 4 + 4 = 8 + 6 = 14 + 8 = 22 Letters : B + 1 = C + 2 = E + 3 = H + 4 = L

33.

Choose the missing terms out of the given alternatives.
Z, ?, T, ?, N, ?, H, ?, B

• (A) W, Q, K, E
• (B) W, R, K, E
• (C) X, Q, K, E
• (D) X, R, K, E

Show Answer

34.

One term in the number series is wrong. Find out the wrong term.
380, 188, 92, 48, 20, 8, 2

• (A) 8
• (B) 20
• (C) 48
• (D) 188

Show Answer

 The correct pattern is - 192, - 96, - 48, - 24, - 12, - 6. So, 48 is wrong and must be replaced by (92 - 48) i.e. 44.

35.

Choose the missing terms out of the given alternatives.
AZ, GT, MN, ?, YB

• (A) JH
• (B) SH
• (C) SK
• (D) TS

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36.

Choose the missing terms out of the given alternatives : J2Z, K4X, I7V, ? , H16R, M22P

• (A) I11T
• (B) L11S
• (C) L12T
• (D) L11T

Show Answer

 The first letters in odd numbered terms from series. J - 1 = I - 1 = H and in even numbered terms from series K + 1 = L + 1 = MMiddle Number : 2 + 2 = 4 + 3 = 7 + 4 = 11 + 5 = 16 + 6 = 223rd letter : Z - 2 = X - 2 = V - 2 = T - 2 = R - 2 = P

37.

One term in the number series is wrong. Find out the wrong term.
15, 16, 22, 29, 45, 70

• (A) 16
• (B) 22
• (C) 45
• (D) 70

Show Answer

 The correct pattern is + 1, + 4, + 9, + 16, + 25 i.e. + 12, + 22, + 32, + 42, + 52. So, 22 is wrong and must be replaced by (16 + 4) i.e. 20.

38.

In the series 2, 6, 18, 54, ...... what will be the 8th term ?

• (A) 4370
• (B) 4374
• (C) 7443
• (D) 7434

Show Answer

 Clearly, 2 x 3 = 6, 6 x 3 = 18, 18 x 3 = 54,..... So, the series is a G.P. in which a = 2, r = 3. Therefore 8th term = ar8-1 = ar7 = 2 x 37 = (2 x 2187) = 4374.

39.

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

Show Answer

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

40.

One term in the number series is wrong. Find out the wrong term.
93, 309, 434, 498, 521, 533

• (A) 309
• (B) 434
• (C) 498
• (D) 521

Show Answer

 The correct pattern is + 63, + 53, + 43, + 33, ..... So, 521 is wrong and must be replaced by (498 + 33) i.e. 525.