And Cheryl rose to fame

A mathematical problem. Half the world trying to solve it. The feeling that a 14-year-old knows more than you. This is what happened this week on the Internet when one of the exercises from a test of the Singapore Mathematical Olympiad. Do we have mathematics so forgotten? These Apps They can help us regain our bearings and self-esteem.

Cheryl, and his date of birth, has been the main reason why many of us have rushed to track down the markets in search of exercises that help us make up for lost time in the field of mathematics. Its birthday has meant a real boom for a type of Apps that, unfortunately, are not the first ones we download on our brand new devices. smartphones. Well, except for calculators.

A good way to exercise our brain is through games and puzzles. Solving small problems helps those who left math behind once they finished college (or long before) to stay in practice. Aequalis either The King of Maths They can be two more than correct options to have a good time accepting and overcoming challenges and levels, each one more complicated than the last.

But since we are not always in the mood to play, and what is most important is often solving a problem, the most popular apps are precisely those that help us find a specific result for a mathematical problem. Beyond traditional calculators, the market offers apps capable of entering into the complexity of trigonometry or algebra, as is the case of Mathway, HandyCalc either Mathematics.

Apps that were useful at some point but would not have been able to solve the problem of logic that we were referring to at the beginning, could you do it yourself?

This is the problem statement:

Albert and Bernard They just became friends with Cheryl and they want to know when her birthday is. Cheryl gives them a list of 10 possible dates
May 15, May 16, May 19
June 17, June 18
July 14, July 16
August 14, August 15, August 17

Then Cheryl tells Albert and Bernard separately the month and day respectively.
-Albert: “I don’t know when Cheryl’s birthday is, but I know Bernard doesn’t know either.”
-Bernard: “At first I didn’t know when Cheryl’s birthday was, but now I know.”
-Albert: “Then I know when his birthday is too.”

When is Cheryl's birthday?

The answer… by clicking here