Challenge Level

Without using a calculator, work out which of the following is the best approximation for $$\sqrt{\frac{2001}{10000}}$$

$0.4,$ $0.42,$ $0.45,$ or $0.47$

*This problem is taken from the World Mathematics Championships*

$0.4,$ $0.42,$ $0.45,$ or $0.47$

You can find more short problems, arranged by curriculum topic, in our short problems collection.