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Olympiad (Class 4) Coding and decoding — practice questions — page 3

Explore 63 free Coding and decoding questions in Olympiad (Class 4) 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 61–63 of 63.

Worked practice questions

Match each substitution code with its deduction rule:

  1. 1-A, 2-B, 3-C
  2. 1-B, 2-A, 3-C
  3. 1-C, 2-B, 3-A
  4. 1-A, 2-C, 3-B
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Correct answer: A. 1-A, 2-B, 3-C

Blue is called green; eraser is called book; water is called food.

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Match each numerical sum coding pattern for words:

  1. 1-A, 2-B, 3-C
  2. 1-B, 2-A, 3-C
  3. 1-C, 2-B, 3-A
  4. 1-A, 2-C, 3-B
Show answer and solution

Correct answer: A. 1-A, 2-B, 3-C

B(2)+A(1)+D(4)=7; C(3)+A(1)+B(2)=6; B(2)+E(5)+D(4)=11.

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Match each deciphering clue from multiple coded statements:

  1. 1-A, 2-B, 3-C
  2. 1-B, 2-A, 3-C
  3. 1-C, 2-B, 3-A
  4. 1-A, 2-C, 3-B
Show answer and solution

Correct answer: A. 1-A, 2-B, 3-C

Common words map to common code tokens: 'fun'='po', 'blue'='da', 'is'='su'.

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