So, ok...something for the numbers fans: what is the lowest number that is exactly divisible by all the digits 1 to 9 ?
What a prime question - and actually relatively straightforward to work out...
For example, if the question was what’s the lowest number that can be divided by 1,2,3,& 4, most people would quickly know to ignore the 1, discount the 2 (because 4=2*2), and do 3*2*2=12.
Similarly, if we made it a bit less straightforward, and said what is the lowest number that can be divided by 3, 5, 6 and 8, then we would work out that 6=3*2, 8=2*2*2, so the answer must be 3*5*2*2*2, and get to 120.
Simples really...
So to answer the question asked, you can see that the only numbers you need are:
5
7
8=2*2*2
9=3*3
and the answer is 5789!
Or (5*7*8*9)=2520....