New!! Now most of the theory and exercises for many of our topics are explained on video. Look for the icon of a video camera and click on it.

Revise your knowledge of percentages. Here you will find exercises on determining percentages (%), calculating the percentage of a number, percentage increases and decreases and calculating initial capital after a percentage increase or decrease.

Revise your understanding of fractions. Here you will find exercises about equivalent fractions, simplifying (reducing) fractions, reducing to the Least Common Denominator, Comparing fractions. Add, Subtract, Multiply and divide fractions. Solve exercises about mixed operations.

Revise your understanding of linear equations, equations with parentheses, equations with fractions, radical equations,...

Revise your understanding of geometric shapes and polygons. Here you will find definitions about almost all figures and polygons and exercises to calculate the area of different types of geometric shapes.

Solve systems of equations by substitution, elimination, graphing,...
You can also solve system of equations using matrices (using the augmented matrix or the inverse matrix method). Have fun while solving word problems using system of equations.

Revise your understanding of arithmetic and geometric sequences and series.

Revise your understanding of exponents and powers. Here you will find activities to cover the basic exponent rules.

Solve right angled triangles by using the Pythagorean Theorem. Solve real life word problems using the Pythagorean Theorem: there are many applications for the Pythagorean Theorem, for example, it can be used to find the distance between two points.

Find the distance between two points in the plane. Find the distance from a point to a line or the distance between two lines in the plane.

Revise your understanding of quadratic equations. Solve complete and incomplete quadratic equations. Solve problems about real life using quadratic equations.

Revise your understanding of variations, permutations and combinations. Solve exercises about variations, permutations and combinations with and without repetition.

Revise your understanding of matrices. Solve exercises about addition, subtraction and multiplication of matrices.

Revise your understanding of factorials. Enter any number you want and the computer will calculate its factorial for you.

Revise your understanding of the inner product of two vectors. Solve exercises about inner product: calculate the value of the inner product of two vectors.

Revise your understanding of trigonometry. Calculate the trigonometric functions of acute angles and improve your knowledge about trigonometry calculating the trigonometric functions of related angles: complementary angles, supplementary and opposite angles. Solve right triangles using trigonometry and solve all triangles using the law of sines and the law of cosines.