Will You Solve These 15 Tricky Problems?
23 21 13 12 A girl, a boy and a dog start walking down a road. They start at the same time, from the same point, in the same direction. The boy walks at 5 km/h, the girl at 6 km/h. The dog runs from boy to girl and back again with a constant speed of 10 MPH. The dog does not slow down on the turn.
15 Qs