Siegel's Paradox
If a fixed Fraction 
of a given amount of money 
is lost, and then the same Fraction of theremaining amount is gained, the result is less than the original and equal to the final amount if a Fraction is first gained, then lost. This can easily be seen from the fact that
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- Multiplicative Digital Root
- Multiplicative Function
- Multiplicative Inverse
- Multiplicative Perfect Number
- Multiplicative Persistence
- Multiplicative Primitive Residue Class Group
- Multiplicity
- Multiplier
- Multiply Connected
- Multiply Perfect Number
- Multisection
- Multivalued Function
- Multivariate Analysis
- Multivariate Function
- Multivariate Theorem
- Mu Molecule
- Mutant Knot
- Mutation
- Mutual Energy
- Mutually Exclusive
- Mutually Singular
- Myriad
- Myriagon
- Mystic Pentagram
- Méiré Pattern