If ICE is written as 18-6-10, how is JAM written in the same code?

20-2-26Correct answerYour answer10-1-13Correct answerYour answer12-3-15Correct answerYour answer22-4-28Correct answerYour answer

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CorrectNot quiteAnswer A

Correct answer: A

I = 9, C = 3, E = 5, and the code numbers 18, 6, 10 are twice these.
So each letter is written as double its position.
JAM: $2 \times 10 = 20$ , $2 \times 1 = 2$ , $2 \times 13 = 26$ , giving 20-2-26.

Worth noting

12-3-15 adds 2 instead of doubling. For I that would give 11, not 18, so the example rules it out.

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

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

Explanation