What do you get if you multiply six by nine?
613 × 913 = 4213
Light refracts off water by 42 degrees to create a rainbow
Light requires 10-42 seconds to cross the diameter of a proton
A completely ordinary number, a number not just divisible by two but also six and seven. In fact, it's the sort of number that you could, without any fear, introduce to your parents
The funniest of the two-digit numbers