Can you solve this Math Challenge of 7?

Can you solve this Math Challenge of 7? | Do it in 7 seconds

You already know that we love the whole team to ask you logical riddles, such as The riddle of coffee cups, and some other mathematical challenge to make you think.We are sure that you are one of those bright and fast minds and that you can give solution to the next mathematical challenge that we bring you.

To curl the curl, and since the mathematical operation goes from number 7, we challenge you to find the solution on 7 seconds, do you dare?

The best thing about math is that they do not allow interpretations, either it is white or black, or it is correct or incorrect, so you should know that the mathematical challenge that we present below has only one solution.

Presentation of the mathematical challenge

Can you solve this Math Challenge of 7? | Do it in 7 seconds

The following algebra problem is apparently very simple to solve, however, it is true frustrating entity to see how most people give a wrong solution to the mathematical operation.

The next mathematical challenge was presented by Presh Talwalkar, presenter of the MindYourDecisions math channel, on YouTube and then I create a strong discussion about which of the answers presented was correct.

Let's see what is the approach to discord:

7 + 7 ÷ 7 + 7 × 7-7=?

If you are quick with math, and more after challenging you to do it in 7 seconds, you will surely have missed some very important details to solve the equation.In a quick race to find the solution as soon as possible, surely your mind will have given you the solution: 56.

We deeply regret to tell you that your mind has precipitated and that 56 is not the correct answer.

You will surely claim that you have followed the operations one by one and that you have even reviewed the result several times (we hope you did not do it with a calculator) and, nevertheless, it continues giving you 56 as a result.

We have to tell you that the detail that you have overlooked is one of the main mathematical rules, the PEMDAS norm of the mathematical order.According to this important rule, the mathematical problems must be solved in the following order: Parenthesis, Exponents, Multiplication, Division, Addition and finally Subtraction.

According to this rule, We cannot solve this mathematical challenge by doing the operations one by one and in order.Here it is not worth applying that of the order of the factors does not alter the product. In mathematics, this statement corresponds to the commutative property and It is a fundamental property that some operations possess according to which, the result of operating two elements does not depend on the order in which they are taken and we can only find it in the sum and in the multiplication.It is evident that in the mathematical challenge that we present to you, there more operations to do besides addition and multiplication, therefore, is not valid.

The way to proceed to adequately solve this equation is with the use of parentheses, even if they are imaginary In that way, we will separate the equations that we must solve first in groups.

This would be the graphic, or mental, way of representing this challenge:

7 + ( 7 ÷ 7) + (7 × 7)-7=?

First we will solve the operations that are within a parenthesis.And we will get the following:

7 + (1) + (49)-7=?

Then we cancel the parentheses to reduce the operation to something as simple as this:

8 + 49-7=?

At this point the error is no longer possible and it is about adding 49 to 8 and subtracting it 7.The solution then for this mathematical challenge is 50, very different from the previous result of 56 that we obtained before applying the PEMDAS standard.

What do you think of the mathematical challenge we have proposed? Have you been able to solve it at first or have you needed some help with our explanation? In any case we hope that you have entertained a little while trying to solve it.

If you are one of those curious minds who like this type of riddles and you have learned little about our mathematical challenge of 7, we want to propose another challenge for you to put your neurons to work do you do you point?

The next challenge is a challenge posed to elementary students and that has become a challenge for adults after a twitter user has published it on networks.

The exercise consists in filling in the missing numbers in the following diagram, it seems simple but finding the pattern that leads you to the correct answer is not.The problem statement says: The number located within the 4 sectors of the outer circle is the same to the sum of the 3 numbers next to their sector.The numbers in the individual circles can only be from 1 to 9 and each of them can only be used once.It is provided to start the number 3 that is located in the center, find the 4 hidden numbers.

Can you solve this Math Challenge of 7? | Do it in 7 seconds

There are many proposals for answers, there are even those who pointed to an error in the statement, however and as we said in the previous case, there is only one correct answer.

The answer to the math challenge of primary school children

To give the answer is about making a kind of sudoku, since that each space can only be occupied by a figure.We leave the resolved graph that is much more explanatory.

Can you solve this Math Challenge of 7? | Do it in 7 seconds

What do you think of these two mathematical challenges? How have they been given to you? Surely you know of some mathematical challenge that you can ask us Do you dare?

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