There are 9 NRICH Mathematical resources connected to Infinity, you may find related items under Place value and the number system.
Broad Topics > Place value and the number system > Infinity
Alison, Bernard and Charlie have been exploring sequences of odd and even numbers, which raise some intriguing questions...
How much of the square is coloured blue? How will the pattern continue?
Can you describe this route to infinity? Where will the arrows take you next?
Infinity is not a number, and trying to treat it as one tends to be a pretty bad idea. At best you're likely to come away with a headache, at worse the firm belief that 1 = 0. This article discusses the different types of infinity.
This article is one parent's story describing his young son's exploration, and growing understanding, of infinity.
This article gives a proof of the uncountability of the Cantor set.
Hilbert's Hotel has an infinite number of rooms, and yet, even when it's full, it can still fit more people in!
Take a line segment of length 1. Remove the middle third. Remove the middle thirds of what you have left. Repeat infinitely many times, and you have the Cantor Set. Can you find its length?
Take a line segment of length 1. Remove the middle third. Remove the middle thirds of what you have left. Repeat infinitely many times, and you have the Cantor Set. Can you picture it?