There are plenty of ways to keep your brain active and engaged during the current lockdown, and a math challenge like this is one of them. Whether you’re already a math whiz or have let your mental arithmetic fall by the wayside since school, this is a puzzle you will surely find entertaining.
Have you seen a math puzzle like this before? Do you know how to solve it? To aid you, the puzzle offers four multiple-choice answers:
Take a moment to figure it out, and when you think you have your answer, or if you’re completely stumped, check down below for the solution.
Were you able to solve it? If so, then congratulations! If not, and if you are puzzled by this answer, see below for an explanation. This was a tricky one even for the best of us!
Firstly, this problem involves a mathematical convention known as the “order of operations,” but it adds a bit of a twist that might catch some of us off guard, as we shall explain.
Functions that are interchangeable at a certain stage in solving the problem should be solved in the order from left to right.
So, let’s look at our original question once again and solve it using this method:
Yet, for the sake of consistency, we shall solve this according to the standardized approach using PEMDAS.
If you got the answer, then we want to congratulate you for sidestepping this little twist in the order of operations, as it could easily have slipped a keen observer’s notice. Or if you assert that this unconventional little trick should be disqualified and the answer should be something different, more power to you!
In any case, if this puzzle provided some level of mental stimulation during these dreary days at home, it will have served its purpose! Please feel free to share it with someone you know who is in need of some mental activity!