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Olympiad (Class 5) Coding and decoding — practice questions — page 2

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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Coding and decoding questions and exercises with answers

Showing questions 31–46 of 46.

In a code, MANGO is written 13-1-14-7-15. What word is 2-1-14?Read the answer and worked solution →In a code, the 1st letter moves 1 place forward, the 2nd moves 2 and the 3rd moves 3. How is AAA written?Read the answer and worked solution →Each letter of a word moves forward by its place in the word (1st by 1, 2nd by 2, 3rd by 3). What does BED become?Read the answer and worked solution →A code adds 1 to the 1st letter, subtracts 1 from the 2nd, and so on alternately. How is HEAD written?Read the answer and worked solution →In a code, 'sun is hot' is 'ka lo mi', 'hot tea' is 'mi pu' and 'sun rise' is 'ka ti'. What does 'lo' mean?Read the answer and worked solution →In a code, 'blue sky' is 'ra su' and 'blue sea' is 'ra ne'. What is the code for 'sea'?Read the answer and worked solution →In a code, 'eat red apple' is 'pa to ki', 'red rose' is 'to mu' and 'sweet apple' is 'ki zo'. What is the code for 'eat'?Read the answer and worked solution →In a code, 3 is 7, 4 is 9 and 5 is 11. What is 8 in the same code?Read the answer and worked solution →In a code, 1 is 2, 2 is 6, 3 is 12 and 4 is 20. What is 5 in this code?Read the answer and worked solution →In a code, P=1, E=2, N=3, C=4, I=5 and L=6. How is the word LINE written?Read the answer and worked solution →In a code, CLOCK is written DMPDL. What rule was used?Read the answer and worked solution →In a code, A is Z, B is Y and C is X. Which word is written ZMW?Read the answer and worked solution →If A=1, B=2 and so on, which word has a letter total of 15?Read the answer and worked solution →In a code, A is 26, B is 25 and so on down to Z as 1. What number stands for D?Read the answer and worked solution →In a code each word is replaced by its number of letters. How is 'I love red apples' written?Read the answer and worked solution →In a code, each consonant is written twice and each vowel once. How is CAT written?Read the answer and worked solution →

Worked practice questions

In a code, MANGO is written 13-1-14-7-15. What word is 2-1-14?

  1. BAN
  2. CAN
  3. BUN
  4. BAT
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Correct answer: A. BAN

The MANGO example shows A is 1 and N is 14, and 2 is B, so the word is BAN.

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In a code, the 1st letter moves 1 place forward, the 2nd moves 2 and the 3rd moves 3. How is AAA written?

  1. CDE
  2. ABC
  3. BBB
  4. BCD
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Correct answer: D. BCD

A+1 is B, A+2 is C and A+3 is D, so AAA becomes BCD.

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Each letter of a word moves forward by its place in the word (1st by 1, 2nd by 2, 3rd by 3). What does BED become?

  1. CFG
  2. DGG
  3. CGG
  4. CGH
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Correct answer: C. CGG

B+1 is C, E+2 is G and D+3 is G, so BED becomes CGG.

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