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Start the new decade with a challenge! This megaquiz will test your knowledge of all the quizzes we wrote in 2018. The questions are randomly selected, so if you want more questions, you can just reload the page. Or head back to our 2019 megaquiz!

Merry Christmas! Here’s our maths gift to you – a puzzle.

Have you ever got halfway through wrapping a present, and then run out of paper? Follow our foolproof method and discover the maths of gift wrapping!

Difficulty: Taxing I have a collection of strange dice.

Written by Celia Berrell A small steel ball in a short smooth tube held in place by a spring, is the kind of switch that works in a twitch and starts an exploding thing.

We’re looking deep into essences and origins. From coffee to antimatter, can you puzzle out the solutions?

String is floppy, so it’s usually a terrible thing to build a tower from. But this tower uses tension and string to hold itself strong!

Difficulty: Tricky Janet is afraid of the dark, especially dark caves and tunnels. Today Janet must catch the train into town. But there’s a problem. As soon as the train leaves the station, it goes into a tunnel.

Have you ever wondered why many old paintings are so shiny? It’s not the paint they used – it’s a varnish that’s applied on top of the paint. These chemicals are designed to enhance and protect precious artworks. And CSIRO just formulated a new varnish that’s taking the art world by storm!

This quiz has a lot of comparisons. From cosmic circles to considerable cats, can you work out the biggest?