Only those who have complete logic will solve the problem correctly. Bashny.Net

Solving speed problems It requires from a person not only attentiveness and resourcefulness, but also promptness. He who thinks too long will certainly give the right answer. But what good is it if he answers last?

And today's edition. "Site" It offers readers to solve several simple tasks, where you need to show not only logical thinking, but also speed. We hope that you will be able to find an approach to solving our problems. Otherwise, you can look at our tips if you have no ideas at all.



Solving speed problems

1. The hostess needs to bake six cakes. How do you handle it in 15 minutes before the guests arrive? After all, only 4 cakes are placed in the pan. And on each side of the cake you need to bake exactly 5 minutes. Can you find a way to get everything done in the allotted time?
   
   
   
   
2. Four members of the family are 73 years old. Four years ago, they were 58 years old. Find out how old the youngest member of the family is. Can you quickly find his age with such scant input?
   
   
   
   
3. To climb to the third floor, you need to climb 26 steps. Can you quickly figure out how many steps it takes to get to the 6th floor? Do not use the calculator and write anything down, decide in your mind and immediately give an answer.
   
   
   
   

Task tips

1. Of course, some will advise to take a larger pan, but this is not our option. And it is quite possible to bake all 6 cakes in 15 minutes. To do this, first put four cakes on the pan and baked them on one side. It'll take 5 minutes. Then turn the cakes over to the other side, but put two of them out, and in their place send cakes that have not yet been baked. This will take another 5 minutes, after which 2 cakes will be completely baked.
   Then there will be 5 minutes, in which you can finish on the other side those 4 cakes that are not yet fully prepared. Task accomplished!
   
   
   
   
   
   
2. In four years, the total age of the four family members would increase by 4 × 4 = 16 years. However, 73 - 58 = 15 years. In this case, we understand that the younger member of the family was born recently, if four years ago his age was not even taken into account. And since the difference is 16 – 15 = 1 year, then 4 – 1 = 3 years. This is the age of the younger family member.
3. To climb to the 3rd floor, you need to overcome two flights. In this case, one span has only 26 ÷ 2 = 13 steps. And to climb from the first floor to the sixth you will need to overcome 5 flights. So we get 13 × 5 = 65 steps.
   
   
   
   

Couldn't get all the tasks done quickly? Then you need to go through such training more often. For example, solve tricky puzzles. Or try to find an approach to interesting examples of actions.