Keeping your brain active is known to help improve cognitive performance, enhance memory, and help with focus and attention. Some even believe that regular brain workouts can delay the symptoms of dementia.

Brainteasers come in all shapes and sizes, and this puzzle is proving to be so hard that apparently, only those with a high IQ can solve it. Although it will force your brain to think outside the box, by challenging yourself to solve the problem you will be improving your mind's ability to focus on a task, as well as your memory and overall cognitive ability.

One test question is proving really difficult for those who struggle at maths, but also those who deem themselves good at it. The seemingly simple question asks people to complete an equation but it's not as easy as it seems.

The problem is that it has left people stumped, with most people not being able to decide between two different answers. So can you work it out?

The maths test question shared on social media shows a truck carrying a number of cubes but how many? The problem has racked up thousands of comments from people trying to solve it with many claiming it can't be solved.

The images showed the side of the truck, the back, and the view from the top. From above, you can see 21 squares. From the side, there are 17, and from the back, nine cubes. Many people came to the answer of 51, while others believed it could range anywhere from 35 to 5, and someone else guessed 49.

One user wrote: "It's 51. You don't need the top view for calculation. So many replies saying it's impossible to answer and there is incomplete information. Like what is the incomplete info?" While another explained: "The maximum number of cubes could be: 3x4x3 + 3*2*2 + 3*1 = 51 But it is possible some are missing in the center row, which is not reflected in the 3 views."

What do you think? Let us know in the comments below.