Answer all the questions below and press submit to see how many you got right.
Factor pair : A factor pair of a natural number $x$ are two factors $f_1$ and $f_2$ of $x$ such that $x=f_1\cdot f_2.$
Select all factor pairs of 21.
Select all factor pairs of 30.
Divisible by 6 : An integer $x$ is called divisible by 6 if $x$ is a multiple of 6. An integer is divisible by 6 if and only if it is even and the sum of its digits is divisible by 3.
Factor : If a natural number is divisible by a second natural number, that second natural number is called a factor of the first natural number. For example the factors of 12 are 1,2,3,4,6 and 12.
Number : A number $x$ is a mathematical symbol representing a quantity.
Select all the numbers that have 6 as a factor.