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puzzle posts

Double Helix Extra: your new email update! Update

by Jasmine, 28 February 2018 | 0 comments

10 year old holding tablet and atomic model.

Double Helix magazine is excited to announce that we’re merging our newsletters Science by Email and Maths by Email, and adding a splash of technology and engineering news. Keep an eye out for our new look email, called Double Helix Extra!

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These tool-building cockatoos have something to crow about News

by David, 12 December 2017 | 0 comments

a cockatoo

Around 15 years ago, a New Caledonian crow named Betty amazed scientists with her talent for tool-building. That was nothing – wait until your meet these clever cockatoos.

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Hanging by a thread Activity

by David, 27 November 2017 | 0 comments

a picture hanging from two pins

You’ll find yourself going a little loopy with this puzzle, but it’s worth unravelling the secret.

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Ultimate dictators Activity

by David, 14 November 2017 | 0 comments

Julius caesar offers you some smarties

Psychologists often use simple games to determine how people make decisions when sharing and saving rewards, such as cash. In this case, we’ll explore the game of dictators using chocolate!

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Five-cent star

by David, 1 August 2017 | 0 comments

Lots of coins on a star.

Here’s a tricky puzzle for you! An eight pointed star, and seven coins. Can you put all the coins onto the star? You will need 7 five-cent coins A copy of the eight-pointed star, which you can get here   The puzzle The aim of the puzzle is to get all seven coins onto the…

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Unchequer the board Activity

by David, 27 April 2017 | 0 comments

Someone is sliding a black counter on a grid

Here’s a quick sliding puzzle to get your brain pumping. See if you can separate the light and dark counters in as few moves as possible! You will need Pen and paper 8 dark counters 7 light counters Setting up

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Big square, tiny envelope Activity

by David, 20 March 2017 | 0 comments

Here’s a quick puzzle for you – this square is too wide for its envelope. Can you find a way to make it fit? You will need Two equal squares of paper Sticky tape Preparation

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Solve the L-puzzle Activity

by David, 31 January 2017 | 0 comments

Here are two tricky puzzles, which look strangely similar. Did we somehow get a puzzle inside your puzzle? You will need Scissors Copy of the printouts, which you can download here (two pages) What to do

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Super strong pencil Activity

by David, 4 January 2017 | 0 comments

In this trick, you’ll wrap a shoelace around a pencil and a strip of cardboard. The string seems to pass straight through both, tearing the cardboard, but leaving the pencil untouched! You will need Pencil 2 rubber bands Thin cardboard Scissors Shoelace Some friends to impress

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Sharing some cakes Activity

by David, 15 December 2016 | 0 comments

Picture this: you’ve just bought a nice little cake, just for you. Then your friends show up, wanting a piece. Lucky for you, mathematicians have developed some pretty cool ways of sharing. You will need Three cakes (include a fancy one with icing, filling and sweet decorations on it, and at least one rectangular one)…

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