Question 13
MediumOriginal questionIn a code language, LION is written as ORLM. Which word is written as GRTVI in that language?
Show the answer and explanation
CorrectNot quiteAnswer D
Correct answer: D
Explanation
L (12) became O (15) and I (9) became R (18): positions add to 27, so each letter is replaced by its opposite.
The opposite code undoes itself, so decode GRTVI by taking opposites again.
G to T, R to I, T to G, V to E, I to R.
The word is TIGER.
Worth noting
IVTRG only reverses the code and HSUWJ shifts it forward by 1. The opposite rule works the same way in both directions.
- Concept
- Decoding an opposite-letter code
- Typical timeTypical
- 70 s
- Your timeYours
- —
Practise this chapter →
Ten questions from Coding and Decoding, at your own pace.