Elaborate riddle asks you to work out what seven 'threes' mean

12 November 2023 , 15:00

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Can you work it out? (Image: Getty Images/iStockphoto)

Exercising your brain is extremely good for you and can improve short-term memory, mental speed and potentially health. It can help slow down cognitive decline, improving both concentration and focus. Brainteasers are one way in which you can get those brain cells working out.

Here's a tricky math's question for you to tackle involving seven lots of threes. Inside the bracket is 3+3x3÷3-3 all of which is over 3. Outside the bracket is the number 3. Can you work out what the answer is?

When the sum was posted on X, formerly Twitter, lots of brain-boxes came up with the answer 1 - did you figure out how they got to that number?

A fiendishly tricky math's question - can you solve it? (X/quiz_riddles)

If you love straining your brain cells, you could try another recent riddle that was deemed so hard to solve it would 'even stump Albert Einstein'. Bright Side who shared the puzzle said even some of their team couldn't work it out. It involved a picture of different cupcakes with varying toppings and the idea is to work out what value each different cupcake is worth before you can reach the answer.

If a visual puzzle is more your thing, try this Bonfire Night themed mind bender. The idea is to find all nine differences between two very busy firework pictures in under 47 seconds - apparently only 10 percent of the population are able to do it in under a minute.

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Another visual image based tester is this one where a dog is hiding in a kitchen which looks very normal at first. There’s brown counters, a rug, a fridge and a bin but a pooch is cleverly camouflaged in there somewhere too. This tricky teaser has gone viral and if you can spot the animal, you apparently have 20/20 vision.

Or there's this riddle which according to Bright Side, adults really struggle with, but kids can solve much more easily because their brains are organised differently. It goes: "People buy me to eat, but never eat me. What am I?" Can you work out the answer?

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Beth Hardie