Free Coding and Decoding MCQs with Answers
114 Coding and Decoding MCQs from Analytical and Logical Reasoning, each with the correct answer and a written explanation of why it is correct. Free and unlimited, with no account needed.
Coding and decoding questions replace letters, numbers, words or symbols with another pattern and ask you to identify the rule or decode a new item. Methods include alphabet positions, shifts, reversals, substitution, rearrangement, numerical values and separate rules for different parts of a code.
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Read the Coding and Decoding notesFree MDCAT chapter notes with key terms114 questions · page 2 of 6
- A. SHO
- B. COL
- C. SCO
- D. SHL
Explanation: Taking the first, third and fifth letters of S, C, H, O, O, L gives S, H and O.
Correct answer: SHO- A. MQJ
- B. MPJ
- C. NQK
- D. MQI
Explanation: L shifted forward by one gives M, O shifted by two gives Q, and G shifted by three gives J.
Correct answer: MQJ23. Suppose in a certain language MADRAS is coded as NBESBT. Then BOMBAY is coded in that language as:
- A. CPNCBZ
- B. CPNCBX
- C. CPOCBZ
- D. CQOCBZ
Explanation: As we can see the code exchanges each letter with the letter that follows it, so A becomes B, B becomes C, C becomes D, and so on.
Correct answer: CPNCBZ- A. USBAELES
- B. USLBESAE
- C. USLBAEES
- D. USLBEAES
Explanation: The way this is coded is that alternate letters in the word are moved one word forward.
Correct answer: USLBAEES- A. 30 + 5 +14 -10 * 15 = 122
- B. 10 + 5 - 14 + 10 * 15 = 158
- C. 30 - 5 + 14 +10 * 15 = 162
- D. 30 * 5 - 4 + 10 - 30 = 30
Explanation: Option A: 30 + 5 +14 -10 * 15 = 122= 30 - 5 - 14 + 10 ÷ 15 (substituting the new symbols)= 30 - 5 - 14 + 0 (10 ÷ 15 = 0)= Option B: 10 + 5…
Correct answer: 30 * 5 - 4 + 10 - 30 = 30- A. 30 + 5 + 14 - 10 * 15 = 122
- B. 10 + 5 - 14 ÷ 10 * 15 = 158
- C. 30 - 5 + 14 ÷ 10 * 15 = 162
- D. 30 * 5 - 4 + 10 + 15 = -15
Explanation: According to this only the last equation 30 * 5 - 4 + 10 + 15 is giving us the correct answer. 30 ÷ 5 + 4 - 10 - 15 gives us -15.
Correct answer: 30 * 5 - 4 + 10 + 15 = -15- A. Granahoon
- B. Pinishur
- C. Pinihoon
- D. Melkegrana
Explanation: Grana means big; melke means tree ; pini means little ;hoon means house. Hence granahoon means big house
Correct answer: Granahoon- A. Blymuth
- B. Hupponot
- C. blydionot
- D. Crinweel
Explanation: Let's break down the given words: Dionot means oak tree Blyonot means oak leaf Blycrin means maple leaf This suggests that "bly" likely…
Correct answer: Crinweel- A. CDKGH
- B. EFMIJ
- C. FGNJK
- D. IHLED
Explanation: Each letter in the word NOIDA is moved one step forward to form the code OPJEB.
Correct answer: EFMIJ- A. Lasandansa
- B. Poeinmigen
- C. Poenforec
- D. Cuopisel
Explanation: Migen means cup; lasan means board; poen means walk; cuop means pull, and dansa means man.
Correct answer: Poenforec- A. 30 + 5 + 14 - 10 * 15 = 122
- B. 10 + 5 - 14 + 10 * 15 = 158
- C. 30 - 5 + 14 + 10 * 15 = 162
- D. 30 * 5 - 4 + 10 - 15 = 15
Explanation: According to this only the last equation 30*5-4+10+15 is giving us the correct answer. 30 ÷ 5 +4-10=15 gives us 15.
Correct answer: 30 * 5 - 4 + 10 - 15 = 15- A. Blymuth
- B. Hupponot
- C. Patricin
- D. Crinweel
Explanation: Let's break down the given words: Dionot means oak tree Blyonot means oak leaf So, in these two words, "onot" means " oak" Blycrin means…
Correct answer: Crinweel- A. CDKGH
- B. EFMIJ
- C. FGNJK
- D. IHLED
Explanation: Each letter in the word NOIDA is moved one step forward to form the code OPJEB.
Correct answer: EFMIJ- A. DEQJQM
- B. EDRIRL
- C. ESJFME
- D. Not possible to determine
Explanation: In order to code FRIEND as HUMJTK, each incoming letter is shifted by one more space than the previous one.F becomes H, showing a shift of…
Correct answer: EDRIRL35. Each letter is replaced by the next letter of the alphabet. CAT is coded as DBU. How is DOG coded?
- A. EPH
- B. EOG
- C. DPH
- D. FQI
Explanation: Move every letter in DOG forward by one position: D becomes E, O becomes P, and G becomes H. Therefore, DOG becomes EPH.
Correct answer: EPH- A. 6-9-19-8
- B. 5-8-18-7
- C. 6-8-19-9
- D. 7-10-20-9
Explanation: The alphabet positions are F=6, I=9, S=19, and H=8. Thus, FISH is written as 6-9-19-8.
Correct answer: 6-9-19-8- A. QKBM
- B. QKBO
- C. OKBM
- D. QJBN
Explanation: Apply the alternating shifts to PLAN: P becomes Q, L becomes K, A becomes B, and N becomes M. The code is QKBM.
Correct answer: QKBM- A. URHS
- B. USHR
- C. VRHS
- D. URHT
Explanation: The opposite letters are F to U, I to R, S to H, and H to S. Therefore, FISH becomes URHS.
Correct answer: URHS- A. ITJG
- B. ISJG
- C. ITKH
- D. JTJG
Explanation: Reverse FISH to get HSIF, then move each letter forward by one. H, S, I, F become I, T, J, G, giving ITJG.
Correct answer: ITJG- A. HWDP
- B. HWDQ
- C. GWCQ
- D. PDWH
Explanation: Moving MATE forward by three gives PDWH. Reversing those letters produces HWDP.
Correct answer: HWDP