Maths

Scientific calculator, percentages, fractions, equations, statistics and geometry.

Scientific calculator — Sines, logarithms, powers, roots and factorials, with history.
Percentages — X% of an amount, what percentage, increases, decreases and change.
Rule of three — Direct and inverse proportion, with the working.
Fractions — Add, subtract, multiply, divide and simplify fractions.
Powers, roots and logarithms — Any exponent, nth root and logarithm in any base.
Equations — Linear, quadratic and systems of two equations.
Mean, median and mode — Mean, median, mode, range, variance and standard deviation of a list.
GCD and LCM — Greatest common divisor, least common multiple and prime factors.
Area and perimeter — Square, rectangle, triangle, circle, trapezoid, rhombus and polygons.
Roman numerals — Convert numbers to Roman numerals and back.
Random numbers — Random numbers between two values, with or without repeats.