For those who have successfully mastered basic arithmetic in elementary school, it may seem very simple and understandable. But wait, there is a puzzle that will easily challenge your beliefs.

It is likely that you will try to solve this puzzle by simply subtracting the number 22 from 28. And it turns out that my daughter is 6 years old.

But let's check this answer. If the mother is 22 and the daughter is 6, then the age difference between them will be 16 years, which does not correspond to the conditions of the problem.

How then to solve such a puzzle correctly It is necessary to create a simple equation, where we denote the daughter’s age by the letter X. In this case, the mother’s age will be calculated as follows: 2X+22\u003d28. Why 2x? Because the age of the mother changed in the same way as the age of the daughter - they simultaneously became a year older and this period of time in the equation must be taken into account twice - both for the mother and for the daughter.

And then everything is quite simple. To find 2X you need to subtract the same 22 from 28 and get 6. And then divide it by 2. In this case, it turns out that X is 3.

Let's check this answer. If the daughter is 3 years old, and the mother is 22 years older than her, then the mother is now 25. Add 25 and 3 - we get 28. The answer has been verified and is therefore correct..