The number written on the front is the final grade (not the exam grade).
Each question was given points out of 10. Questions 1 and 4 have two parts and each part is worth 5 points.
The number of points you got for each question /part should be both in the chart on the front and next to the questions themselves. Also, in most cases there should be a short explanation on why points were lost (if you answered true when the answer is false, we don't write an explanation, because all points are lost).
If any of these aren't clear on your exam, please come to Rani or me and we'll look at it.