# Blog

## The big triangle brainteaser

By David Shaw, 17 April 2019

At Three Peaks School, they’re planning to build a gigantic triangle. The sides have just arrived, on the back of some truly ridiculous trucks, and with police escort.

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## Blue eyed cows brainteaser

By David Shaw, 3 April 2019

Imagine a place called Occhiblu station, where they’re trying to breed cows with blue eyes. They have 100 cows on the station, and some of them have one blue eye. Of the rest of the cows, half have two blue eyes.

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## Checking the clock brainteaser

By David Shaw, 20 March 2019

Terry is inspecting a huge clock. It’s 2:12 and they just finished examining the big hand.

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## Mathematical pizza party

By David Shaw, 6 March 2019

Four mathematicians – Annie, Beth, Carol and Donna – have a fun tradition. Every Friday, they order a pizza. But before they can eat, they must each solve a puzzle.

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## No zeros

By David Shaw, 20 February 2019

Which two whole numbers – without any zeros – multiply together to make 1 000 000?

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## Curious times

By David Shaw, 7 February 2019

Maryam had been practising the times tables really hard, so she was on the alert for interesting patterns. On her dad’s birthday she noticed something special. “You’re four times older than me, Dad,” she exclaimed.

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## Successive sequence

By David Shaw, 23 January 2019

What’s the next letter in this sequence? F, S, T, F, F, S, S, E …

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## Counting threes

By David Shaw, 9 January 2019

Tilly started writing down numbers as she counted them out, “1, 2, 3, 4 …” She was interrupted when she was writing down the 33rd 3. What number was she in the middle of writing?

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## This code’s for oldies

By David Shaw, 12 December 2018

If you’re sitting there twiddling your thumbs, see if you can decode this message. If you need a hint, you can always phone a friend! 3666882255533 443355544499 339987772

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## Number cruncher

By David Shaw, 28 November 2018

I have four different whole numbers written on a piece of paper. The largest number is four bigger than the smallest. The middle two numbers are even. If I add all four numbers together, I get 12. What are my numbers?

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