Chocolate Challenge!

There are 30 children lining up outside ready to sit down at a table.

30 / 3 = 10

30 / 2 = 15

10 + 15 = 25 then you add another 5 to the 25 which will equal 30.

So 5 children would be at 1 table, then 10 children would be at table 2 and at table three would be 15 children.