James buys 100 tennis balls and gives half of them away.  The other half he puts into 5 large containers.  How many tennis balls go in each container?
How many tennis balls does James keep? ** He keeps 100/2=<<100/2=50>>50 tennis balls
How many tennis balls go in each container? ** So 50/5=<<50/5=10>>10 go in each container
#### 10