RECKON you have what it takes to solve the "intelligence test" that has been sweeping Facebook?
The mind boggling test requires users to complete a few sequences of numbers - and makers claim just one in 1,000 people can find two different solutions to the problem.
The test, which has been leaving internet users scratching their heads, requires players to "think outside the box".
Makers from Go Tumble wrote on the test: "This maths riddle is not that simple.
"Even though there's usually one right answer for maths problems, two common solutions are causing heated debates all over the world."
The test requires users to see which rule has been applied to the top line, and then apply this to the following lines.
If your rule is correct, you should reach the same answers as is shown on the first three lines, and then continue this to the fourth and final line to get the end solution.
The test was uploaded on Wikr and has left many people baffled, so can you solve the equations to end up with two different answers?
Firstly, most people will agree that 1 + 4 = 5, without much debate.
They will then add 2 + 5 to the 5 from the top line to get the second answer of 12.
Following this logic, on the third line they will add 3 + 6 to get 9, and add this to the 12 to get 21.
And finally, you will add 8 + 11 in the last equation, which gets 19, and again, add this to the previous answer of 21, to get a final total of 40.
However, this isn't the only way of solving the problem.
The game makers said that obviously 1 + 4 = 5, but you can also reach 5 by adding 1 to 4 x 1.
With this rule, on the second line you would add 2 to the sum of 2 x 5. This would total 12, as is shown in the picture.
On the third line they would add 3 to 6 x 3 to get 21.
And for the final line of the problem, they would add 8 to 11 x 8 to get a final answer of 96.
Did you manage to find both answers?
If you're in the mood for another test, we recently shared another fiendish vision quiz which challenges you to spot the odd shape out.
Of course, these aren't the only brain teasers to baffle viewers. See if you can spot a panda among a sea of skulls.
And another puzzler asks you to spot the one 50 pence piece where The Queen is winking.
This article originally appeared in The Sun and has been republished with permission.