alleryA badge shifts letters forward 2 places, wrapping Z to A. Code for WAX?
- YCZ
- XBY
- YBZ
- ZDA
Show answer and solution
Correct answer: A. YCZ
Moving W, A and X forward two places gives Y, C and Z, so the code is YCZ.
RPF Constable Coding and Decoding — practice questions
Explore 25 free Coding and Decoding questions in RPF Constable General Intelligence and Reasoning. Open each question or exercise to read its content, reference answers and available explanation.
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Showing questions 1–25 of 25.
A badge shifts letters forward 2 places, wrapping Z to A. Code for WAX?Read the answer and worked solution →A label shifts each letter forward 3 places. What word is coded ERDW?Read the answer and worked solution →A token uses reversed A-Z mapping (A=Z, B=Y, ...). What is MAP's code?Read the answer and worked solution →A lock uses fixed letter replacements: CAMP becomes RQTX. Code for MAP?Read the answer and worked solution →A parcel code replaces C with @, A with # and B with %. Code for CAB?Read the answer and worked solution →Each letter has a distinct fixed digit. Which could be NOON's code?Read the answer and worked solution →A shop codes digits as letters: 1=M, 2=A, 0=T, 5=P. What does PMT mean?Read the answer and worked solution →Match the taught relationRead the answer and worked solution →Using A=1,...,Z=26, decode 2-9-18-4.Read the answer and worked solution →A code uses △=4, ○=7 and □=2. Which code represents274?Read the answer and worked solution →Reverse a word, then move each letter one place forward. What is the code for PARK?Read the answer and worked solution →Shift odd-position letters forward1 and even-position letters back1, wrapping A/Z. Code WARM.Read the answer and worked solution →Replace each letter by its opposite in A-Z, then reverse the result. Code TOP.Read the answer and worked solution →Codes: clear road=pa mi; road safe=mi tu; clear signal=pa zo. Code safe signal.Read the answer and worked solution →Shift the nth letter forward n places, wrapping Z to A, then reverse all letters. Code WAVE.Read the answer and worked solution →Order is ignored: red fast train=ka mi lo; green fast bus=tu mi pa; red slow bus=ka se pa; green slow train=tu se lo. Code green slow bus.Read the answer and worked solution →Use reverse-alphabet values A=26,...,Z=1, then add each letter’s position in the word. Code HAND.Read the answer and worked solution →Reverse a four-letter word, swap letters within each adjacent pair, then shift every letter forward2. Code MINT.Read the answer and worked solution →A four-letter code swaps the first two letters, shifts the third back2 and the fourth forward3. Decode HSGS.Read the answer and worked solution →A–D are distinct digits1–9. AB+CD=BA uses two-digit numbers; A+D=12 and B>D. What digit is C?Read the answer and worked solution →A–E encode bijectively as A–E; none stays unchanged. D→A; exactly one of A→B,C→D holds. A’s code is alphabetically just after E’s; B’s code is after E’s. Code BE?Read the answer and worked solution →A–F are six distinct nonzero digits. As two-digit numbers, AB=2×CD and EF=3×CD; B+D=14. Find FE.Read the answer and worked solution →Five codebits a–e are0/1. a+b+c and b+c+d are even; c+d+e is odd. Received10110 has exactly2 wrong bits. Find the original first3 bits.Read the answer and worked solution →Code with two operationsRead the answer and worked solution →Use the full coding ruleRead the answer and worked solution →
Worked practice questions
A label shifts each letter forward 3 places. What word is coded ERDW?
- COAT
- BOAT
- GOAT
- BEAT
Show answer and solution
Correct answer: B. BOAT
Shifting E, R, D and W back three places gives B, O, A and T, forming BOAT.
A token uses reversed A-Z mapping (A=Z, B=Y, ...). What is MAP's code?
- MZK
- NZL
- NZK
- KZN
Show answer and solution
Correct answer: C. NZK
In the reversed alphabet, M becomes N, A becomes Z and P becomes K, giving NZK.
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