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Red and black brainteaser Brainteaser

by David, 12 June 2019 | 12 comments

Brain icon

I have four playing cards: two of them are black and two are red. I turn them face down so you can’t see the colours, and shuffle them so you don’t know which is which. If you pick two of these cards at random, are they more likely to be the same colour or different…

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Pyramid solitaire Activity

by David, 16 January 2017 | 0 comments

Many people know how to play solitaire or patience . But there are actually lots of different one-player card games. This version of patience has a bit of addition, and also some tricky strategic thinking. You will need Deck of cards

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Trading game Activity

by David, 13 July 2016 | 0 comments

You will need A copy of the trading game cards, printed out Scissors At least $5 in spare change Counters in four colours Big counter Pencil Paper Setting up

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Card teaser Activity

by David, 5 June 2015 | 0 comments

Many games are competitive, but in this game you have to cooperate. Try to work out the card on your head, but be careful. If either of you make a mistake, you both lose! You will need Deck of cards Two hats, beanies or sweatbands

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Shuffle like a pro! Activity

by David, 8 September 2014 | 0 comments

Someone has cupped their left hand around the deck of cards and is shuffling them.

You will need Two decks of cards. Younger mathematicians with small hands might have difficulty with a full sized deck of cards. Using smaller cards might be easier. If you’re still having difficulty, try asking an adult for help with shuffling. Overhand shuffle (for right-handed people) If you are left-handed, click here to see the…

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Double Helix – back to basics Activity

by Mike, 18 May 2013 | 2 comments

Adenine molecule marked with an A.

Two centuries ago, nobody knew much about what made a single fertilised cell grow into a human. Or – for that matter – a dog, a sea urchin, a worm or a whale. The problem was nobody could imagine how a microscopic bag of chemicals could possibly split in half again and again, yet still…

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