Series Completion Reasoning MCQs for Competitive Examination
In the following questions, which one set of letters when sequentially placed at the gaps in the given letter series shall complete it?
Q. 1
A _ C _ E _ B _ DE
(A) CADB
(B) DBAC
(C) BDAC
(D) BADC
Answer: (C) BDAC
Explanation: ABCDE/ABCDE
Q. 2
r _ pr _ p _ q _ r _ p
(A) qrppq
(B) qqrpq
(C) qrprp
(D) qrppr
Answer: (B) qqrpq
Explanation: rqp/rqp/rqp/rqp
Q. 3
a _ c _ e _ b _ de
(A) acab
(B) abcd
(C) bdac
(D) abdc
Answer: (C) bdac
Explanation: abcde/abcde
Q. 4
_ b _ d _ bc _ ab _ d
(A) acacd
(B) acadc
(C) accda
(D) accdd
Answer: (B) acadc
Explanation: abcd/abcd/abcd
Q. 5
a _ b _ a _ c _ a _ bc
(A) bccbb
(B) bcbca
(C) cabca
(D) acbcb
Answer: (A) bccbb
Explanation: abbc/accb/abbc
Q. 6
M _ N _ M _ MR _ R _ N
(A) RMRMN
(B) RRNNM
(C) RNRNM
(D) MMRRN
Answer: (B) RRNNM
Explanation: MRNRMN/MRNRMN
Q. 7
ab _ bc _ bb _ _ abb _ c
(A) babcb
(B) bbaaa
(C) aabbc
(D) abcbc
Answer: (A) babcb
Explanation: abbbc/abbbc/abbbc
Q. 8
CDEF _ EDC _ DE _ FED_
(A) FCFC
(B) FCCD
(C) DCCC
(D) DEFC
Answer: (A) FCFC
Explanation: CDEF/FEDC/CDEF/FEDC
Q. 9
K _ L _ K _ LN _ M _ N
(A) MNMLK
(B) NMMLK
(C) MNMKL
(D) MLNKM
Answer: (C) MNMKL
Explanation: KMLN/KMLN/KMLN
Q. 10
p _ r _ s _ q _ p _ rs
(A) qrspq
(C) qsrpq
(C) qsrqq
(D) qsprq
Answer: (C) qsrpq
Explanation: pqrs/srqp/pqrs
Q. 11
NO _ PQN _ PP _ NOP _ Q
(A) OPQP
(B) POQP
(C) PQQP
(D) PONQ
Answer: (B) POQP
Explanation: NOPPQ/NOPPQ/NOPPQ
Q. 12
ab _ ba _ babd _ acb _ bdba _ b
(A) dcabc
(B) acbcd
(C) cdabc
(D) dcbac
Answer: (D) dcbac
Explanation: abdbacb/abdbacb/abdbacb
Q. 13
a _ b _ aad _ ca _ dbc _ adb _ a
(A) dbcaca
(B) dcabac
(C) dcbaac
(D) dcabca
Answer: (C) dcbaac
Explanation: adbca/adbca/adbca/adbca
Q. 14
U _ _ R P K Q _ U K D _ P K _ R _ K D R _ K _ R
(A) KDRRQPPR
(B) KQPRQUPQ
(C) KDRRUURQ
(D) KDRRQUPQ
Answer: (D) KDRRQUPQ
Explanation: UKDRPKQR/UKDRPKQR/UKDRPKQR
Q. 15
s _ _ m r q c t _ p d m _ q _ t s _ _ m r q c t
(A) rdsrcrd
(B) pdsrcrd
(C) pdsrbpd
(D) pdsrcpd
Answer: (D) pdsrcpd
Explanation: spdmrqct/spdmrqct/spdmrqct
Q. 16
t s m _ _ n q _ _ s m m n _ _ s t _ m m n _ q s
(A) nmstnqns
(B) mmstmqtn
(C) mnstnqsn
(D) mnstnqmn
Answer: (C) mnstnqsn
Explanation: tsmmnnqs/tsmmnnqs/tsmmnnqs
Q. 17
d _ fde _ _ deee _
(A) eeff
(B) cdef
(C) ddee
(D) deee
Answer: (A) eeff
Explanation: def/deef/deeef
Q. 18
_ r _ r _ t _ r _ r _ t
(A) tpprpp
(B) ttprrp
(C) tpptpp
(D) ttpprp
Answer: (C) tpptpp
Explanation: trprpt/trprpt
Q. 19
_ qr _ srq _ p _ rs _ r _ p
(A) pqrsss
(B) qprsss
(C) pspqsq
(D) pspqqq
Answer: (C) pspqsq
Explanation: pqrssrqp/pqrssrqp
Q. 20
x _ zz _ xx _ z _ yx
(A) xyxy
(B) xxxy
(C) yyyz
(D) zyyy
Answer: (C) yyyz
Explanation: xyzzyx/xyzzyz