Even my wise grandmother, a former math teacher, made the mistake of solving this example. Bashny.Net

Mathematical figures A brilliant invention that allowed humanity to create the highly developed world that we can observe today. It is not surprising that mathematics has been revered at all times, and even now it is treated especially reverently.



And today's edition. "Site" Readers are encouraged to work with numbers. Try to solve these simple problems to stretch your brain and test your mathematical abilities. Do not lose your vigilance in the process, because there is always a childish error that will eventually lead to the wrong answer.

Mathematical figures

1. In the first problem, we need to decide which mathematical operations to perform to get 58. And we can divide and multiply and perform addition with subtraction. Can you figure out what to put instead of question marks, so that the example becomes complete?
   
   
   
   
2. The second problem is solved by the same logic. However, only two signs need to be calculated. Although the numbers are larger than in the previous task, which adds to the complexity. Still, we're sure you can handle it here. And you do not need to chaotically try all the options. Just look at the example to find a clue that will lead to the correct answer.
   
   
   
   
3. The third example you've seen in preview. This is a more standard problem. However, there is a catch where people who have already forgotten some of the basic rules of mathematics come across. Are you sure you can't be fooled? Then hurry to solve this example to enter the correct number instead of the question mark.
   
   
   
   

Tips and answers

1. It is easy to understand that without multiplication and division can do. Therefore, only addition and subtraction are useful. Notice that 30 + 30 = 60, and we need to get 58 (which is 2 less). We understand that the solution is close, because the "-2" can be obtained if you add 7 and subtract 9.
   
   
   
   
2. There is no need to divide and multiply. What are the mathematical operations to get 144 if you have 76, 84 and 16? According to the last digits, we understand that to get “4” after the equal sign we need 76 – 16 + 84 = 144. And indeed, after such arithmetic operations, everything came together.
   
   
   
   
3. In the last example, everything is simple, because there is no need to go through the options, it is only one. Do things in brackets first (as the basic rules of mathematics require), and then decide from left to right. Some people manage to get one here, but this is a mistake. And the correct answer is 64.
   
   
   
   

Did you manage to solve everything without mistakes? Share your decisions and answers in comments with other readers. Also try to solve other tricky examples. Or, think about the lightweight puzzles that do not take much time.