Practice MCQ Questions and Answer on Series Completion

11.

Choose the missing terms out of the given alternatives : b e d f ? h j ? l

• (A) i m
• (B) m i
• (C) i n
• (D) j m

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 The series may be divided into groups as shown:b e d / f ? h / j ? lClearly in the first group, the second group and third group , letters are respectively three and two steps ahead of the first letter. A similar pattern would follow in the second and third groups.

12.

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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13.

Choose the missing terms out of the given alternatives.
AYD, BVF, DRH, ?, KGL

• (A) FMI
• (B) GMJ
• (C) GLJ
• (D) HLK

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14.

Choose the missing terms out of the given alternatives : A, B, B, D, C, F, D, D, H. E, ?, ?

• (A) E, F
• (B) F, G
• (C) F, I
• (D) J, F

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 The given sequence is a combination of two series:I: 1st , 3rd, 5th, 7th, 9th, 11th terms i.e., A, B, C, D, E, ?II: 2nd, 4th, 6th, 8th, 10th terms i.e., B, D, F, H, ?Clearly , I: consists of consecutive letters while II: consists of alternate letters. So, the missing letter in I is F, while that in II is J.So, the missing terms i.e., 10th and 11th terms re J and F respectively.

15.

2, 15, 41, 80, ?

• (A) 111
• (B) 120
• (C) 121
• (D) 132

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 The pattern is + 13, + 26, + 39,..... So, missing term = 80 + 52 = 132.

16.

Choose the missing terms out of the given alternatives : BMX, DNW, FOU, ?

• (A) GHO
• (B) GPS
• (C) HPS
• (D) HPT

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 1st letter : B + 2 = D + 2 = F + 2 = H 2nd letter : M + 1 = N + 1 = O + 1 = P 3rd letter : X - 1 = W - 2 = U - 1 = T

17.

24, 60, 120, 210, ?

• (A) 300
• (B) 336
• (C) 420
• (D) 525

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 The pattern is + 36, + 60, + 90,.....i.e. + [6 x (6 + 0)], + [6 x (6 + 4)], + [6 x (6 + 9)],... So, missing term = 210 + [6 x (6 + 15)] = 210 + 126 = 336.

18.

Choose the missing terms out of the given alternatives.
b e d f ? h j ? l

• (A) i m
• (B) m i
• (C) i n
• (D) j m

Show Answer

 The series may be divided into groups as shown: b e d / f ? h / j ? l Clearly in the first group, the second and third letters are respectively three and two steps ahead of the first letter. A similar pattern would follow in the second and third groups.

19.

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

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 Z - 6 T - 6 N - 6 H - 6 BZ -3 W - 3 T - 3 Q- 3 N - 3 K - 3 H - 3 E - 3 B

20.

2, 3 ,8 , 27, 112, ?

• (A) 226
• (B) 339
• (C) 452
• (D) 565

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 The pattern is x 1 + 1, x 2 + 2, x 3 + 3, x 4 + 4,..... So, missing term = 112 x 5 + 5 = 565.