The method of rounding to a significant figure is often used as it can be applied to any kind of number, regardless of how big or small it is. When a newspaper reports a lottery winner has won £3 ...

And how many of them are needed to build a house of cards? Just one — if you're willing to decorate it with decimals and call it science. A global analysis claims plastics are responsible for 13.497% ...

The moment you’ve produced a single numeric “estimate,” you’ve created a guess dressed in statistical clothing. As you add more estimates, your guess may become more or less respectable, but it ...

Leave the digit the same if the next digit is less than 5 (this is called rounding down) but increase it by 1 if the next digit is 5 or more (this is called rounding up). The rounded value must be a ...