Not necessarily, when it comes to money.
Look for hidden gems in the gaps between known prime numbers.
Can Santa fit all the presents in his sack in time?
Santa's not the only one who cares if you've been naughty or nice!
How to deliver all those presents?
Raging rivers and thundering waves are exciting and frightening and for mathematicians they are a massive problem.
Statistics wouldn't work without it
How to make a geodesic dome