Logic, maths and fun come all wrapped up in one tricky puzzle package. Each little story gives you just enough information to determine what's bigger, who weighs more, how much gets sold, and lots of other confounding brain twisters. Example: At the Zoo Five animals at the zoo got into an argument about their ages because the oldest gets fed first, and they're all ravenous. See if you can figure out how old each animal is: 10, 11, 12, 13 or 14 years! 1. The otter is older than the leopard. 2. The emu is younger than the otter. 3. The leopard is older than the hippopotamus. 4. The hippo is older than the emu and the lion. 5. The lion is older than the emu.