Blog posts with problems to get your brain going! You get a new problem every fortnight and the solutions are published later.

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_{You may notice some problems are missing... I'm still migrating articles from my old blog.}

Can you prove that there are arbitrarily many primes in arbitrarily big intervals?

Three mathematicians discuss a beautiful flower garden and the coloured flowers within.

Two realtors discuss who's netting the award for highest average commission, but it isn't clear who the winner is...

Please help me identify these 100 light bulbs by turning ON and OFF their switches.

Can you help these kids trick or treat their entire neighbourhood in this Halloween special?

How can two doctors operate two patients with only two pairs of latex gloves?!

If I scramble a Rubik's cube for long enough, will it solve itself?

It's night time and 4 friends need to cross a fragile bridge, but they only have one torch. What's the order in which they should cross?

Three friends are given three different numbers that add up to a dozen. Can you figure out everyone's numbers?

You have two magical ropes that you can set on fire and you need to count 45 minutes. How do you do it?

Two doors, one gives you eternal happiness and the other eternal sadness. How can you pick the correct one?