We’ve taken a dive into deep waters today for our brainteaser – and only those with a high IQ will be able to spot the odd fish out in seconds.

Visual tests or brainteasers – like this one – are one way that you can check how your mental and observational agility fares against others.

Puzzles are one of the best ways to stimulate the brain and give the mind some much-needed exercise. There are three different types of brainteasers: observational, analytical, and mathematical.

Mathematical…