2. Let the score be X/Y, then (x+1)/y =1/3x/(y+1) = 0.25.

3. Let the total length be x (x/5+x/5+15): x =1:4.

4. Let warehouse A be x, then 0.4x: (420-x+0.6x) = 2: 5.

5. If they are all X people, then (x/7+5): x = 1: 5.

Solve x by yourself