About This Set
This set is a step up. Most questions need two steps or a careful setup: a train that slows down after a fault, two chasers who start from different places, a train passing two walkers one after the other, a race where the start is given in seconds, or three runners on one track. The five questions marked [Tier 2] are mostly Tier 2 material, so if you are preparing for Tier 1 only you can leave them for later. Take about 35 minutes and finish before you read the explanations. 18 or more right means you can handle this chapter at exam level.