Brain teasers have always been recommended to keep your mind sharp. They test cognitive skills that improve your memory, ability to learn and problem-solving skills.
Brain teasers also challenge you to think outside the box and The Mirror has posted a new tricky one - courtesy of Jagran Josh - to test you. If you can spot the odd letter in 21 seconds, you fall into the “high IQ” bracket. You’ll see the same letter again and again in different bright colours - but there is an odd one out.
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