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To find XV cubed in Roman numerals, first find XV squared and then multiply your answer by XV. This is in effect XV cubed. XV squared = X(XV)+V(XV) Multiplying out the brackets = CL+LXXV When simplified = CCXXV CCXXV times XV = X(CCXXV)+V(CCXXV) Multiplying out the brackets = MMCCL+DDLLXXV When simplified = MMMCCCLXXV Therefore XV cubed = MMMCCCLXXV (3375) Numerical values: M=1000, D=500, C=100, L=50, X=10, V=5 and I=1. David Gambell, Merseyside, England.

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Q: Can you work out XV cubed showing all your workings?
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How do you find 11 cubed in roman numerals showing all your workings?

The Roman numerals for 11 are XI. To find XI cubed first calculate XI squared snd then multiply this by XI which in effect is XI cubed. XI squared = X(XI)+I(XI) Multlplying out the brackets = CX+XI (110+11) When simplified = CXXI (121) XI times CXXI = X(CXXI)+I(CXXI) Multiplying out the brackets = MCCX+CXXI (1210+121) When simplified = MCCCXXXI (1331) Therefore 11 cubed in Roman numerals = MCCCXXXI (1331) David Gambell, Merseyside, England.


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