Whether in the form of problems or puzzles, IQ tests Mathematics are exercises that test your intelligence and help you improve your mental ability.
As they often require logical thinking, lateral thinking and problem-solving skills to find solutions, these brain exercises are perfect for keeping all your cognitive abilities active.
Especially since you can also have fun.
IQ test: “If 87 + 92 = 22, 39 + 21 = 13, then how much is 52 + 31?” »
Brain exercise that we propose to you below requires unconventional thinking taking into account the constraints and information given. This therefore involves thinking and a lateral approach.
As a result, this math puzzle requires a certain level of creativity and critical thinking. Indeed, you will be forced to think differently and find unexpected solutions to solve it.
You are ready ? Take a good look at the following image. You will find 2 equations already solved and another that requires your intervention.
Based on the logic used in these first two operations, try to find the answer to 52 + 31.
Take as much time as necessary to analyze and decipher this math problem. However, don’t forget to start your timer to measure your speed of analysis.
Know that the geniuses managed to solve it in less than 20 seconds. What will happen to you? Good luck !
IQ test: The correct answer
Have you considered different approaches and applied all your mathematical knowledge and expertise, but can’t seem to piece together the clues and find the code that solves this math puzzle? Keep looking a little longer before you give up.
Now that you have used all your resources, it is time to reveal the correct answer.
The solution
The solution we had to obtain is 9.
Did you achieve this result? If so, our congratulations! You have great intelligence and we are sure that you are a creative person with good problem-solving skills.
If you haven’t found this figure, here’s how to proceed.
You had to add each digit of the first term and subtract the two digits of the second term before adding them as follows: 87 + 92 = (8 + 7) + (9 – 2) = 15 + 7 = 22. Similarly, in the second equation, you have 39 + 21 = (3 + 9) + (2 – 1) = 13.
For the last equation, you then have: 52 + 31 = (5 + 2) + (3 – 1) = 7 + 2 = 9.
