Racing: This is to find the least common multiple: 24 minutes (assuming that the length of a lap is 1 and the time to reach the starting point is t, there is: (1\ 6-1\ 8) * t =1to get: t=24).

Come on, grab: Wenwen 9.5 and 95 brothers: 9.5 and 95 companies have the same personal level because their average level is the same.

Swimming: (1)100 * 60 = 6000m2 (2) 60 * 2.5 * 2+100 * 2.5 * 2+6000m2 (3)100.

Departure question: the least common multiple question again: 60 minutes.

Wood: Let the side length of a square be x and the volume be v..

Then it is: x*4.5= 1.8, so x=0.4.

So: v=x*x*4.5=0.72 cubic meters.

Um ... . I can't even do elementary school questions. . . I hope I can help you. . .