The Intelligence section of AISSEE (25 questions for Class 6) and the Reasoning section of the RMS CET test how quickly you spot patterns. Try these 10 MCQs on Coding-Decoding in about 8 minutes, then check the answer key and explanations below.
Quick facts: AISSEE 2027 will be held on Sunday, 31 January 2027. There is no negative marking, so attempt every question. Online applications are open until 2 December 2026 on exams.nta.nic.in/sainik-school-society.
Practice Questions
Q1. In a certain code, LAMP is written as MBNQ. How is FISH written in that code?
(A) GJTI
(B) HKUJ
(C) EHRG
(D) ITJG
Q2. If CAKE is coded as EKAC, how is BIRD coded?
(A) IRDB
(B) DRIB
(C) CJSE
(D) RIBD
Q3. If A = 1, B = 2, C = 3 and so on, and SUN = 54, then what is LID?
(A) 19
(B) 25
(C) 27
(D) 21
Q4. In a certain code, BOOK is written as CPPL. How is FISH written in that code?
(A) HKUJ
(B) EHRG
(C) ITJG
(D) GJTI
Q5. If HAND is coded as DNAH, how is PLAY coded?
(A) YALP
(B) LAYP
(C) QMBZ
(D) ALPY
Q6. If A = 1, B = 2, C = 3 and so on, and DOG = 26, then what is the value of RAT?
(A) 37
(B) 39
(C) 41
(D) 35
Q7. In a certain code, ROSE is written as QNRD. How is MILK written in that code?
(A) LHKJ
(B) MILK
(C) NJML
(D) JKHL
Q8. If DESK is coded as KSED, how is GOLD coded?
(A) LOGD
(B) DLOG
(C) HPME
(D) OGDL
Q9. If A = 1, B = 2, C = 3 and so on, and CAT = 24, then what is the value of FAN?
(A) 19
(B) 21
(C) 23
(D) 20
Q10. In a certain code, BOOK is written as ANNJ. How is LAMP written in that code?
(A) LAMP
(B) MBNQ
(C) KZLO
(D) OLZK
Answer Key with Explanations
(A) GJTI — Each letter is moved 1 place forward in the alphabet.
(B) DRIB — The letters are written in reverse order.
(B) 25 — Add the position values of the letters: 12 + 9 + 4 = 25.
(D) GJTI — Each letter is moved 1 place forward in the alphabet.
(A) YALP — The letters are written in reverse order.
(B) 39 — Add the position values of the letters: 18 + 1 + 20 = 39.
(A) LHKJ — Each letter is moved 1 place backward in the alphabet.
(B) DLOG — The letters are written in reverse order.
(B) 21 — Add the position values of the letters: 6 + 1 + 14 = 21.
(C) KZLO — Each letter is moved 1 place backward in the alphabet.
How did you score?
9–10 correct: excellent — move on to a full-length mock test. 6–8: good — revise the explanations of the questions you missed. Below 6: study this topic again from your NCERT book and retry these questions after two days.
Free AISSEE / RMS Mock Test
Want a full-length mock test with an All-India rank? Enunciate Academy runs online coaching for Sainik School, RMS, Navodaya and RIMC entrance exams for Class 6 and 9 students across Andhra Pradesh and Telangana. Message us on WhatsApp (94924 44498) to get a free mock test, or see the Spark batch details.
