Question 1128511
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They want you find the lowest positive integer number, which is divided by 3, 5 and 6 without remainder.


Obviously, this integer must be a multiple of the product 3 and 5, i.e. 15, and as soon as you understand it, 

you will find the answer in 3 seconds:  the number under the question is 30.


This number is called the "Least Common Multiple" of numbers 3, 5 and 6, or LCM (3,5,6) for brevity.


In this case it is simply the product of all prime numbers, that factor the numbers 3, 5 and 6.
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