We have shown that with some graphical support we can find cube roots of any number with ease.

It is nice to see how geometry could play a vital role in showing students the actual convergence of a sequence of numbers to cube roots, which students only perceive as an algebra problem.

He completed square roots within 30 seconds and cube roots within a minute, said a Limca spokesman.

To find out the cube root of up to 15-digit perfect cubes or the square root of up to 10-digit perfect squares will take me between 15 and 50 seconds, depending on the number of digits involved," said Mr Thomas.

Children will learn to calculate

cube roots instantly in their heads and figure out the day of the week of any date in the past, present or future.

The Human Calculator" features both a "Cool Tricks" section that teaches children to calculate

cube roots instantly in their heads and "Cal," an animated calculator who guides young users through the program.