Practice MCQ Questions and Answer on Series Completion
21.
Choose the missing terms out of the given alternatives : AZY, BUT, CXW, DWV, ?
(A) EVA
(B) EVU
(C) VEU
(D) VUE
Solution:
1st letter : A + 1 = B + 1 = C + 1 = D + 1 = E 2nd letter : Z - 5 = U + (5 - 2) = + 3 = X - (3 - 2) = - 1 = W + (1 - 2) = - 1 = V 3rd letter : Y - 5 = T + (5 - 2) = + 3 = W - (3 - 2) = - 1 = V + (1 - 2) = - 1 = U
22.
One term in the number series is wrong. Find out the wrong term.
4, 10, 22, 46, 96, 190, 382
(A) 4
(B) 10
(C) 96
(D) 382
Solution:
The correct pattern is + 6, + 12, + 24, + 48, + 96, + 192. So, 96 is wrong and must be replaced by (46 + 48) i.e. 94.
23.
Choose the missing terms out of the given alternatives.
ejo tyd ins xch ?
(A) nrw
(B) mrw
(C) msx
(D) nsx
Solution:
There is a gap of four letters between the first and second, the second and third letters of each term, and also between the last letter of a term and the first letter of the next term.
24.
One term in the number series is wrong. Find out the wrong term.
121, 143, 165, 186, 209
(A) 143
(B) 165
(C) 186
(D) 209
Solution:
Each term in the series is obtained by adding 22 to the preceding term.So, 186 is wrong and must be replaced by (165 + 22) i.e. 187.
25.
Choose the missing terms out of the given alternatives : WFB , TGD , QHG , ?
(A) NIJ
(B) NIK
(C) NJK
(D) OIK
Solution:
1st letter : W - 3 = T - 3 = Q - 3 = N 2nd letter : F + 1 = G + 1 = H + 1 = I 3rd letter : B + 2 = D + 3 = G + 4 = K
26.
5, 2, 7, 9, 16, 25, ?
(A) 41
(B) 45
(C) 48
(D) 52
Solution:
Each term in the series, except the first two terms, is the sum of the preceding two terms. So, missing term = 16 + 25 = 41.
27.
2, 15, 41, 80, ?
(A) 111
(B) 120
(C) 121
(D) 132
Solution:
The pattern is + 13, + 26, + 39,..... So, missing term = 80 + 52 = 132.
28.
Choose the missing terms out of the given alternatives :S-4, F-6, H-8, J-10, ?, ?
(A) K-12, M-13
(B) L-12, M-14
(C) L-12, N-14
(D) K-12, M-14
Solution:
The letters in the series are alternative and the numbers indicate their position in the English alphabet from the beginning.
29.
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.
30.
Choose the missing terms out of the given alternatives.
ADVENTURE, DVENTURE, DVENTUR, ?, VENTU
(A) DVENT
(B) VENTURE
(C) VENTUR
(D) DVENTU
Solution:
One letter from the beginning and one from the end of a term are removed, one by one, in alternate steps.