Brainteasers are a great way to stretch the mind and push one of the body’s most important muscles to its limit.
They can come in many forms. They can be mathematical, observational, or they can come in the form of an optical illusion.
A mathematical brainteaser is one which asks the user to solve a maths question while an observational brainteaser asks you to spot something inside the image.
Hoppa has created an observational brainteaser ... Read even more
