A maths quiz is baffling social media. Picture: iStock
A maths quiz is baffling social media. Picture: iStock

The maths quiz that’s got social media stumped

A TRICKY maths problem is stumping social media.

Sharing the conundrum online, mathematician Ed Southall, from the University of Huddersfield, shared a picture of a pink triangle inside a square, along with the question: "What fraction is shaded?"

Twitter users were quick to jump on the puzzle and many shared their attempts at solving the question - while others admitted that their minds had been boggled by the maths riddle.

The maths problem baffling everyone.
The maths problem baffling everyone.

Thankfully, education charity CEO David Weston has managed to offer a simple reasoning behind the correct answer - which is a third.

The key to getting the correct answer is working out that the height of the triangle is two thirds that of the square's height.

David explained: "Pink triangle and little triangle have all the same angles: they're 'similar'.

"Base of pink is twice base of little [triangle]. So height of pink is also twice height of little.

"So height of pink is two-thirds of whole square."

The final stage of solving the problem involves using the formula for working out the area of a triangle - half x base x height.

As the height is two-thirds of the square, you can take the base to be equal to one when using the formula.

So, as David explains, the area is half x one x two-thirds.

This means the area of the triangle is a third of the area of the square.

Did you get it?

This article originally appeared on The Sun and has been republished with permission.


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