Question:Lizzie has half as many crayons as Bobbie. Bobbie has three times as many crayons as Billie. If Billie has 18 crayons, how many crayons does Lizzie have?
Answer:Bobbie has 18 * 3 = <<18*3=54>>54 crayons.
Lizzie has 54 / 2 = <<54/2=27>>27 crayons.
#### 27