alleryStart learning →In a code, each letter moves 1 step forward in the alphabet. How is CAT written?
- DBS
- DBU
- CBU
- BZS
Show answer and solution
Correct answer: B. DBU
C becomes D, A becomes B and T becomes U, giving DBU.
Olympiad (Class 5) Coding and decoding — practice questions
Explore 46 free Coding and decoding questions in Olympiad (Class 5) Reasoning. Open each question or exercise to read its content, reference answers and available explanation.
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Showing questions 1–30 of 46.
In a code, each letter moves 1 step forward in the alphabet. How is CAT written?Read the answer and worked solution →If every letter is moved 3 steps forward, how is CODE written?Read the answer and worked solution →In a code, MOON is written as NPPO. How is STAR written in the same code?Read the answer and worked solution →In a code, each letter is moved 1 step forward. What does IFMMP stand for?Read the answer and worked solution →A word is coded by moving each letter 2 steps forward. The code is JQV. What is the word?Read the answer and worked solution →If A=1, B=2, C=3 and so on, how is the word CAB written in numbers?Read the answer and worked solution →In a code, A is written as Z and B as Y. How is D written?Read the answer and worked solution →In a code, A is Z, B is Y and so on backwards. How is MAN written?Read the answer and worked solution →In a code, people call red 'blue', blue 'green' and green 'white'. What is the colour of grass called?Read the answer and worked solution →In a code, sky is called water, water is called road and road is called tree. What do cars run on in this code?Read the answer and worked solution →In a code, milk is called ink, ink is called pen and pen is called book. What do we write with, in this code?Read the answer and worked solution →Cat means dog, dog means cow, cow means hen. Which word names the milk animal?Read the answer and worked solution →If ÷ means + and + means ÷, what is the value of 12 ÷ 3 + 3?Read the answer and worked solution →Morse code sends each letter as a pattern of which two signals?Read the answer and worked solution →In Morse code, which very common English letter gets the shortest code, a single dot?Read the answer and worked solution →After whom is Morse code named?Read the answer and worked solution →In a code, E is a dot, T is a dash and A is dot-dash. How is TEA written?Read the answer and worked solution →Does International Morse code use different signals for capital and small letters?Read the answer and worked solution →A code that shifts every letter by a fixed number of places is named after which Roman leader?Read the answer and worked solution →In a code every letter moves 3 places back, so D becomes A. What does K become?Read the answer and worked solution →A code only rearranges the letters of a message and never changes the letters. What is it called?Read the answer and worked solution →A code swaps each letter for a different letter but keeps the order. What is it called?Read the answer and worked solution →What is the step of turning a coded message back into the original message called?Read the answer and worked solution →The secret rule that tells how each letter is changed in a code is called the what?Read the answer and worked solution →Which method, based on studying letter counts, helps to break a simple letter-swap code?Read the answer and worked solution →Which letter is the most common in English text, so a good first guess for the commonest coded letter?Read the answer and worked solution →In a code, words are written backwards. What does NIARB decode to?Read the answer and worked solution →In a code, the first and last letters of a word swap places. How is PLAN written?Read the answer and worked solution →If A=1, B=2 and so on, which word does 3-1-20 stand for?Read the answer and worked solution →In a code, each vowel becomes the next vowel (A to E, E to I, I to O, O to U, U to A). How is BOAT written?Read the answer and worked solution →
Worked practice questions
If every letter is moved 3 steps forward, how is CODE written?
- GSHI
- EQCD
- FRGH
- FRHG
Show answer and solution
Correct answer: C. FRGH
C to F, O to R, D to G and E to H give FRGH.
In a code, MOON is written as NPPO. How is STAR written in the same code?
- UVCT
- TUCS
- TUBS
- RSZQ
Show answer and solution
Correct answer: C. TUBS
Each letter moves one step forward, so S, T, A, R become T, U, B, S.
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