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Coding and Decoding · Question 5 of 66

Question 5

EasyOriginal question

In a certain code, BIRD is written as YRIW. How is FISH written in that code?

Options for question 5

Show the answer and explanation
CorrectNot quiteAnswer D

Correct answer: D

Explanation

  1. B (2nd letter) became Y (25th), I (9th) became R (18th): each pair of positions adds up to 27, so every letter is replaced by its opposite letter.

  2. Opposites: F (6) to U (21), I (9) to R (18), S (19) to H (8), H (8) to S (19).

  3. The code is URHS.

Worth noting

A letter and its opposite always have positions adding to 27 (A–Z, B–Y, C–X …). URHT gets the last opposite wrong by one place.

Concept
Opposite-letter code (A↔Z)
Typical time
40 s
Your time
—
The rule this testsLetter-shift and reversal codes
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Ten questions from Coding and Decoding, at your own pace.

Practise this chapter →

Ten questions from Coding and Decoding, at your own pace.