#1 - think of it as a fraction. if you have two triangle and four squares when simplifying you get ½. which is what #1 means. for #4 it is the same thing except flipped around. instead of it being triangles to squares it's squares to triangles. for #6 again it's a fraction. simplify the fraction getting you ½ again. if you have 6/2 and reduce it you have 3/1 showing that for every 3 smiley faces there is 1 triangle as stated in the option. hope this helps you with the answer and understanding.
