A problem by Noel Lo

Level pending

10 → 1 10 \rightarrow 1

89 → 6 89 \rightarrow 6

90 → 2 90 \rightarrow 2

450 → 3 450 \rightarrow 3

2015 → ? 2015 \rightarrow ?


The answer is 4.

Noel Lo by Noel Lo , 24, Singapore

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1 solution

Noel Lo
Mar 27, 2015

The number on the right indicates the number of characters used when writing the number on the left in Roman numerals.

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10 is written as X, 89 as LXXXIX, 90 as XC, 450 as CDL and 2015 as MMXV.

Noel Lo - 6 years, 2 months ago

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Good Problem!

Swapnil Das - 6 years, 2 months ago

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Thank you!!!

Noel Lo - 6 years, 2 months ago

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