Most of us have little trouble working out how many milliliters are in 2.4 liters of water (it's 2,400). But the same can't be said when we're asked how many minutes are in 2.4 hours (it's 144).

If you don't pay much attention to toy trends, you might think that LEGO sets for kids are all that's available. That hasn't been the case for a while – in fact, the brick-building company makes ...