What is meant by "evenly divisible"? "What is the smallest positive number that is evenly divisible by all of the numbers from 1 to 20?"
Is it different from divisible?
 A: Evenly divisible means that you have no remainder. 
So, 20 is evenly divisible by 5 since 20 / 5 = 4.
Though, 21 is not evenly divisible by 5 since 21 / 5 = 4 R 1, or 4.2.
A: Evenly divisible is same as divisible. So, you are just looking for the L.C.M. of first $20$ natural numbers.
A: evenly divisible = divisible .
A: "Evenly divisible" is equivalent to the term ``divides.'' 
For example, we can say that "20 is evenly divisible by 5", which is equivalent to saying that  "5 divides 20"; or in mathematical notation, $5 | 20$.
I am sure that the author of the question that you cite, "What is the smallest positive number that is evenly divisible by all of the numbers from 1 to 20?" chose to use the term "evenly divisible" instead of the more ordinary "divides", because to opt for the latter one would need to say something long-winded like, "1|n" and $2|n$ and \ldots and $20|n$, where $n$ is the smallest such integer in question. 
A: Means the same as "divisible". Answer is $2\times3\times5\times7\times11\times13\times17\times19$.
A: Evenly divisible would mean that the number is divisible by any number completely. To answer your question, the correct answer is 20! (20 factorial).
