11
27720
7 itself. Actually, 0 is also divisible by 7, as are negative multiples of 7, so it really depends what set of numbers you consider. If you include negative numbers, there is no "smallest multiple".
13
108 -999, if you consider negative numbers.
27720. Try it. I think it works. From the internet.
The smallest number which is exactly divisible by the numbers 8 9 and 10 is 360.
12
Every number is divisible by 1. Including negative numbers, that's an infinite list. There is no smallest.
27720
7 itself. Actually, 0 is also divisible by 7, as are negative multiples of 7, so it really depends what set of numbers you consider. If you include negative numbers, there is no "smallest multiple".
13
27720
16
108 -999, if you consider negative numbers.
11
27720. Try it. I think it works. From the internet.
The smallest number divisible by first four prime numbers is 2x3x5x7 = 210.