Start learning →

SSC CGL Coding Decoding — practice questions — page 2

Explore 95 free Coding Decoding questions in SSC CGL Reasoning. Open each question or exercise to read its content, reference answers and available explanation.

Practise Coding Decoding with Quill →

Coding Decoding questions and exercises with answers

Showing questions 31–60 of 95.

In a code each letter is moved 3 places back. Which word was coded as GRJMP?Read the answer and worked solution →A word is coded by moving each letter 3 places back, giving LSBO. What was the word?Read the answer and worked solution →When letters are moved 3 places back, IXWV stands for which original word?Read the answer and worked solution →In a code that moves each letter 3 places back, DOG is written as what?Read the answer and worked solution →Shifting every letter 3 places back, the word BROWN is turned into which code?Read the answer and worked solution →If every letter is replaced by the one 3 places before it, what is QUICK written as?Read the answer and worked solution →A variation of the Caesar cipher wrote A as 4 and B as 5. Which number stands for C?Read the answer and worked solution →In a code A is 4, B is 5, C is 6 and so on. How is the word BAD written?Read the answer and worked solution →In a number code with A as 4 and B as 5, the number 10 stands for which letter?Read the answer and worked solution →The ROT13 system is a Caesar cipher using a shift of how many places?Read the answer and worked solution →If each letter is moved 13 places forward in the alphabet, how is CAT coded?Read the answer and worked solution →A code moves every letter 13 places forward. What is ROT written as?Read the answer and worked solution →A message is coded with a 13 place shift and the result is coded the same way again. What do you get?Read the answer and worked solution →A text is shifted by 5 places and then by 9 places. This equals one shift of how many places?Read the answer and worked solution →Encrypting twice with shifts of 7 and then 8 is the same as encrypting once with what shift?Read the answer and worked solution →What does a brute force attack on a Caesar cipher involve?Read the answer and worked solution →Which scholar of the 9th century wrote the earliest surviving work on solving substitution ciphers?Read the answer and worked solution →Which two letters are usually the most frequent in English plaintext?Read the answer and worked solution →How does the Vigenère cipher use the Caesar cipher?Read the answer and worked solution →In which kind of children's toy can Caesar ciphers still be found today?Read the answer and worked solution →What does the Atbash cipher do to the alphabet?Read the answer and worked solution →If every letter is replaced by its mirror letter (A with Z, B with Y), how is CAT written?Read the answer and worked solution →In a code where A is swapped with Z, B with Y and so on, DOG is written as what?Read the answer and worked solution →Using the reverse alphabet code (A to Z, B to Y), what is SUN written as?Read the answer and worked solution →Each letter is replaced by its opposite in the alphabet (A with Z, B with Y). How is KING coded?Read the answer and worked solution →With A coded as Z and B as Y, the word LOVE is coded as what?Read the answer and worked solution →A message in a mirrored alphabet code (A with Z, B with Y) reads GSV. What does it say?Read the answer and worked solution →In a code where every letter is exchanged with its mirror letter, ZMW stands for which word?Read the answer and worked solution →Using A to Z, B to Y pairing, how is EAST written?Read the answer and worked solution →In the Atbash cipher on the English alphabet, which letter is paired with J?Read the answer and worked solution →

Worked practice questions

In a code each letter is moved 3 places back. Which word was coded as GRJMP?

  1. KUMPS
  2. HUMPS
  3. JUMPS
  4. JUMPY
Show answer and solution

Correct answer: C. JUMPS

Moving every letter of GRJMP three places forward undoes the code and gives J, U, M, P, S.

Open this question →

A word is coded by moving each letter 3 places back, giving LSBO. What was the word?

  1. OVER
  2. EVER
  3. OVEN
  4. OPEN
Show answer and solution

Correct answer: A. OVER

Adding three places to L, S, B and O gives O, V, E and R.

Open this question →

When letters are moved 3 places back, IXWV stands for which original word?

  1. LAZY
  2. HAZY
  3. LAZE
  4. MAZE
Show answer and solution

Correct answer: A. LAZY

Shifting I, X, W and V three places forward restores L, A, Z and Y.

Open this question →

How to practise

  1. Choose a Coding Decoding question and try to work out your answer.
  2. Open the question to check the correct answer and read its worked solution.
  3. Continue in the app for bite-sized lessons, explanations and review with Quill. You can start without creating an account.

Put it into practice

Continue with Coding Decoding practice for SSC CGL. Read explanations as you go. No signup form needed to start.

Practise Coding Decoding →

More Reasoning topics