Digits are coded as: 4→P, 7→A, 2→R, 5→M, with these conditions: (i) if the first digit is odd and the last is even, both are coded as the code of the last digit; (ii) otherwise each digit uses its own code. Code the number 5472.

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Accepted Answer

RPAR. First digit 5 is odd and last digit 2 is even, so condition (i) applies: both are coded as the code of 2, which is R. The middle digits 4 and 7 keep their codes P and A, giving R P A R.

Digits are coded as: 4→P, 7→A, 2→R, 5→M, with these conditions: (i) if the first digit is odd and the last is even, both are coded as the code of the last digit; (ii) otherwise each digit uses its own code. Code the number 5472.

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