A boy staring at ants suddenly thinks of a fun but difficult Maths problem. How long will it take the ants to fall off the stick he's looking at, if they keep bumping into each other and changing directions? Does this sound impossible to solve? It isn't! Read on to find out the boy's ingenious solution!The I'm a Maths Star! series comprises challenging Maths puzzles, presented in story form. Puzzles are described and then solved, step-by-step, through...