$$\dfrac{27}{(2+1)}=9$$, $$9\times2=18$$. 
There were $$27$$ children in a class.  There were twice as many boys as girls.  How many boys were there? 

* $$21$$ boys 
* $$18$$ boys 
* $$16$$ boys 
* $$14$$ boys 
* $$9$$ boys 