We have to find the LCM of those numbers.
We can do these equations to find them out.
1=1*1
2=2*1
3=3*1
4=2^2
5=5*1
6=3*2
7=7*1
8=2^3
9=3^2
10=5*2
LCM=2^3 * 3^2 *5*7=2520.
Therefore smallest number which is divisible by 1,2,3,4,5,6,7,8,9 and 10 is 2520.
Yay!