Square roots
Practice square roots of perfect squares, estimating roots, and irrational numbers.
Available exercises
Cube root (perfect cube)
A perfect cube is shown under the cube-root sign. Find its cube root — the number that, multiplied by itself three times, gives the radicand.
Evaluate a root expression
Work out the value of an expression that adds, subtracts or multiplies two square roots of perfect squares.
Rational or irrational?
A number is shown. Decide whether it is rational (can be written as a fraction) or irrational.
Estimate a square root
The square root of a non-perfect square is shown. Estimate it to the nearest whole number using the two nearest perfect squares.
Square root (perfect square)
A perfect square is shown under the radical sign. Find its square root — the number that, multiplied by itself, gives the radicand.