22. Numbers are placed in a triangle.
The numbers in the middle of the sides are the sum of the numbers at the ends.
Fill in the missing numbers for this triangle:
39. In a game two discs are tossed and the numbers landing uppermost are added together. The red disc has the number 3 on one side and 5 on the other side; whereas the blue disc has 4 on one side and 7 on the other. If they land so that 3 and 7 are showing, the score is 10. Write down the other possible scores for this game.
40. Each of the symbols has a different value associated with it. When you add up the value of all the symbols you get the total value for that row or column. Find the value of each symbol.