# Let’s Challenge Your Brain What Number Should Replace The Question Mark?

Focus. Something most of us lack, especially now that many of us are working and studying from home! That is why it is even more important than ever to keep our minds active! And, what better way to do that than with some fun online puzzles? Math puzzles are especially good for the brain because they make us think. Not only that, but a little distraction from our normal routines is so much needed! Look at the math problem that follows and see if you can figure out what number to replace the question mark with!

## Ready? Let us give it a go!

Not all of us were gifted with the ability to understand math. It can be quite difficult even for the smartest math boffs around! Take a look at the following image and see if you can figure out the correct number to replace the question mark. Don’t worry, the answer will follow, but try figure it out on your own before you scroll down!

As you can see by the picture, there are four equations. Each one except the last has an answer. What you need to do is figure out what the answer for the fourth equation is, and to do that, you will have to find what number each emoji represents.

## Could you figure out what to replace the question mark with?

So, how did you do? Was it tough? let us first have a look at how to work out what each emoji represents before we give you the answer.

### Equation 1

This equation shows a lipstick, plus a lipstick, plus a lipstick. It then tells us that this equals 30. This one should be quite simple. Just divide 30 by 3 and your answer will be that each lipstick represents 10.

### Equation 2

Here we see lipstick plus mirror plus mirror. We already know what a lipstick represents, so to make the sum equal 20, each mirror must be representative of the number five. In other words, 10 + 5 + 5 = 20

### Equation 3

In the last equation that shows us the answer, we see mirror + two nail polishes + two nail polishes and that the answer in number form is 9. This means that the polish must be quite a low number since a mirror is valued at 5. A quick way to work it out is to minus 5 from 9, leaving us with 4. This means that each polish has a value of 1.

## Time for the answer and to replace the question mark!

What makes equation number four a little harder is that instead of the whole sum being addition, there is a multiplication sign added to the mix! Could you figure out the answer to replace the question mark?

### We see that it is a mirror + one nail polish x lipstick

Now, if a mirror equals to 5, one nail polish equals 1 and a lipstick equals 10, it obviously means that the equation is 5 + 1 x 5. If we think back to what we learned in school. You would then write it out like this: 5 + (1 x 10). Making the answer to replace the question mark easy! It is 15.