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**binomial: anInteger**- Compute the number of combinations of anInteger objects among a number of objects given by the receiver.
**ceilingLog: radix**- Answer (self log: radix) ceiling. Optimized to answer an integer.
**estimatedLog**- Answer an estimate of (self abs floorLog: 10)
**even**- Return whether the receiver is even
**factorial**- Return the receiver's factorial.
**floorLog: radix**- Answer (self log: radix) floor. Optimized to answer an integer.
**gcd: anInteger**- Return the greatest common divisor (Euclid's algorithm) between the receiver and anInteger
**lcm: anInteger**- Return the least common multiple between the receiver and anInteger
**odd**- Return whether the receiver is odd