A popular pastime to engage in on the internet is seeing if you can beat and solve these puzzles that nobody else can seem to get. There are many puzzles out there that have pretty hard riddles and equations that you need to solve which very few people get right.

These puzzles are great because you may come across one that is actually in your area of expertise or practice, and you will be able to solve and beat it when everybody else is failing!

There are puzzles for the eyes, the math brain, and even the book worm by testing their knowledge in the general English language.

If you are one who is particularly inclined to like dealing with numbers, then this puzzle will be perfect for you. This puzzle has a riddle of numbers being added, and you need to recognize the pattern that the mathematics is presenting to you in order to guess the last number.

It may seem like a very simple puzzle at first, but its does in fact have quite a non-intuitive though process that goes along with it.

Check out the equations below and see if you can recognize any type of pattern or sequence that goes along with it.

You will probably find yourself looking at this puzzle and wondering what that last number is, because it is in fact quite a hard puzzle. If you can get this one right, that means you are better than 90% of other people who are taking this puzzle!

If you just simply cannot figure it out, then don’t worry because we will offer a full explanation as to how you get the last number below.

The last number can be calculated in two different ways.

Method 1: To get the last number, ad the numbers on the right side of the equation, and then multiply that sum by three. By this logic, 1+5=6, which indeed gives you 18. 2+10=12, which when multiplied by 3 does give you 36, and same with 54. So 4+20=24, multiplied by 3 gives you 72.