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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