Did you know?
What comes after million, billion and trillion? Quadrillion, quintillion, sextillion, septillion, octillion, nonillion, decillion then undecillion.
A number is divisible by 3 if the sum of its digits is divisible by 3. For example, 3,240's digits add up to 9 which is divisible by 3, so 3,240 must also be divisible by 3.