Take a look at a different problem solving exercise using Venn diagrams. Remember to draw the Venn diagram and add information as you go along. This will help you keep an overview of what is going on.
Let us jump straight to the problems to understand the solution methodology. Let us draw a Venn Diagram with the information as provided above. therefore numbers divisible by 2, 3 and 5 = 27 + 13 + 3 ...