A squared number is what you get when you multiply a number by itself; for example, 4 is the square of 2, because 2x2=4, and 25 is the square of 5, because 5x5=25, and so on. A cubed number is what you get when you multiply a number by itself TWICE; for example, if you do 2x2x2, first 2x2=4, and then this multipled by 2 again =8, so 8 is the CUBE of 2. 4x4=8, and 8 multiplied by 4 again=32, so 32 is the CUBE of 4. Numbers that you multiply to get their square or cube root