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**abs**- Answer the absolute value of the receiver
**arcCos**- Answer the arc cosine of the receiver
**arcCosh**- Answer the hyperbolic arc-cosine of the receiver.
**arcSin**- Answer the arc sine of the receiver
**arcSinh**- Answer the hyperbolic arc-sine of the receiver.
**arcTan**- Answer the arc tangent of the receiver
**arcTan: x**- Answer the angle (measured counterclockwise) between (x, self) and a ray starting in (0, 0) and moving towards (1, 0) - i.e. 3 o'clock
**arcTanh**- Answer the hyperbolic arc-tangent of the receiver.
**ceilingLog: radix**- Answer (self log: radix) ceiling. Optimized to answer an integer.
**cos**- Answer the cosine of the receiver
**cosh**- Answer the hyperbolic cosine of the receiver.
**estimatedLog**- Answer an estimate of (self abs floorLog: 10). This method should be overridden by subclasses, but Number's implementation does not raise errors - simply, it gives a correct result, so it is slow.
**exp**- Answer e raised to the receiver
**floorLog: radix**- Answer (self log: radix) floor. Optimized to answer an integer.
**ln**- Answer log base e of the receiver
**log**- Answer log base 10 of the receiver
**log: aNumber**- Answer log base aNumber of the receiver
**negated**- Answer the negated of the receiver
**positiveDifference: aNumber**- Answer the positive difference of the receiver and aNumber, that is self - aNumber if it is positive, 0 otherwise.
**raisedTo: aNumber**- Return self raised to aNumber power
**raisedToInteger: anInteger**- Return self raised to the anInteger-th power
**sin**- Answer the sine of the receiver
**sinh**- Answer the hyperbolic sine of the receiver.
**sqrt**- Answer the square root of the receiver
**squared**- Answer the square of the receiver
**tan**- Answer the tangent of the receiver
**tanh**- Answer the hyperbolic tangent of the receiver.
**withSignOf: aNumber**- Answer the receiver, with its sign possibly changed to match that of aNumber.