Practice MCQ Questions and Answer on Series Completion
201.
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
Solution:
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.
202.
7, 26, 63, 124, 215, 342, ?
(A) 391
(B) 421
(C) 481
(D) 511
Solution:
The terms of the given series are (23 - 1), (33 - 1), (43 - 1), (53 - 1), (63 - 1), (73 - 1),..... So, missing term = (83 - 1) = (512 - 1) = 511.
203.
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
Solution:
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.
204.
One term in the number series is wrong. Find out the wrong term.
1, 5, 9, 15, 25, 37, 49
(A) 9
(B) 15
(C) 25
(D) 37
Solution:
The terms of the given series are 12, (22 + 1), 32, (42..+ 1), 52, (62 + 1), 72. So, 15 is wrong and must be replaced by (42 + 1) i.e. 17.
205.
One term in the number series is wrong. Find out the wrong term. 0, 2, 3, 5, 8, 10, 15, 18, 24, 26, 35
(A) 18
(B) 24
(C) 26
(D) 10
Solution:
The given sequence is a combination of two series: I. 0, 3, 8, 15, 24, 35 and II. 2, 5, 10, 18, 26 The pattern in both I and II is + 3, + 5, + 7, + 9,..... So, in II, 18 is wrong and must be replaced by (10 + 7) i.e. 17.
206.
Choose the missing terms out of the given alternatives : DHL, PTX, BFJ ?
(A) CCK
(B) KOS
(C) NRV
(D) RVZ
Solution:
1st letter : D + 12 = P + 12 = B + 12 = N 2nd letter : H + 12 = T + 12 = F + 12 = R 3rd letter : L + 12 = X + 12 = J + 12 = V
207.
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
208.
4, 7, 12, 19, 28, ?
(A) 30
(B) 36
(C) 39
(D) 49
Solution:
The pattern is + 3, + 5, + 7, + 9, ..... So, missing term = 28 + 11 = 39.
209.
In the series 10, 17, 24, 31, 38,.....which of the following will be a number of the series ?
(A) 48
(B) 346
(C) 574
(D) 1003
Solution:
The given series consists of numbers each of which, on dividing by 7, leaves a remainder 3. No other number except 346 satisfies the property.
210.
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.