Only those with the sharpest minds can solve this Halloween brainteaser in 15 seconds

Brainteasers are a great way of keeping your mind sharp. This Halloween brainteaser from Thortful asks you to find the orange in a sea of pumpkins and other spooky items

Brits can get themselves into a spooky spirit with this Halloween brainteaser.

The brainteaser is not the most difficult and the sharpest minds tend to find it within 15 seconds. It is different for us all, however, and some people may not be able to solve it quite as quickly. This could be because of poor eyesight or if they simply are not used to solving brainteasers. If you are stuck, then look at the answer in the picture below.

This particular puzzle, from card company Thortful, asks you to find an orange amid a spooky scene full of pumpkins and other ghostly objects.

If you still can't find the orange, look at the left hand side of the image. The orange is the same colour as the surrounding pumpkins but it can be spotted once you look near the tip of the purple hat on the left hand side.

Thortful said: “While the brainteaser looks straightforward, solving it has taken some Brits up to 9 minutes! However, those with the sharpest minds can solve it in under 15 seconds."

Brainteasers are a great way of keeping your mind sharp, but they can often trick us. Certain optical illusions can leave us feeling very confused.

The Dean McGee Eye Institute said: “There are occasions when the brain is unsure of what it sees. Optical illusions occur when your eyes are presented with colors, lights, patterns, borders or areas of contrast that mislead the brain. It tries to piece together images using optical clues, learned assumptions and past visual experiences. In these cases, there is a difference between the reality of what you see and what your brain thinks you see. As a result, your brain makes a guess and is tricked into seeing something that does not exist, or it struggles to decide between alternating versions of an image.”

Completing challenging puzzles, brainteasers and optical illusions may help improve your cognitive function, boost productiveness and memory, however. Nicole M. Avena, PhD, assistant professor of neuroscience at the Mount Sinai School of Medicine in New York City and visiting professor of health psychology at Princeton University said: “While some studies show that brain training games are not effective, the recollection and work that the brain does during these games keeps your mind fresh and alert… Brain functions that you practise during these games—and the repetition of them—can help improve response time and sharpness.”