Gaussian integer adjunct algebraic number arithmetical proportion cardinal cardinal number complex number component contingent continued fraction cross section defective number detachment detail division dole even number finite number geometric ratio harmonic proportion imaginary number impair improper fraction infinity installment integer irrational irrational number item mixed number ordinal pair parcel part particular percent percentage polygonal number portion prime number proportion pure imaginary quadrant quarter quota quotum random sample rate ratio rational rational number real real number rectangular number remainder round number rule of three sample sampling section sector segment serial number share subdivision subgroup subspecies surd transcendental number transfinite number whole number