Question

To which subsets of the real numbers does the number the square root of 42 belong?

Answer 1

in the set of real number there are rational number.... ( the number can be written as a fraction) e.g. 12%, 32, 0.6, 42.1 0.3333333

numbers that can't be written as fractions are called irrational numbers... these include surds.

hope this helps.