In the given figure, ∠ABD = 55° and ∠ACD = 30°. If ∠BAC = y° and non-reflex ∠BDC = x°, then what is the value of x – y?
Select the option that is best represented by the given Venn diagram. 
Doctor, Man, Student
Family, Parents, Children
Table, Chair, Furniture
Gold, Silver, Ornaments
When is International Dance Day celebrated?