How to find people on the area or stadium

One way or another we are at large public events: concert on the square, celebrate Victory Day, okazyvalsa in the theater, go to football or on the Day of the city. Sometimes, looking at this crowd, you begin to understand how many people live in your town! And how many of them will help you understand this statement.

Instruction

Difficulty level: Easy

step 1

You see in front of a crowd all at once you cannot compute, ( unless to take a picture and its on a computer with a large approximation to consider the house ). So, you need to decide how to split the crowd into equal parts . At the stadium, all conveniently divided into sectors. In the square most likely have to mentally razlieiti the area into equal parts. For example: up to the monument to Lenin after him. Sometimes it is convenient to focus on the benches, poles or lights if they are the same distance from each other.

2 step

Now you need to determine how to visually looks grupka of 100 people. You can find people from 1 to 100, but it is easier to do this if you first count 25 pieces these individuals moving, and then take 4 of these piles.

3 step

The most difficult task, which mostly depends on the accuracy of the calculation: you need to know how many people enrolled in one sector ( parts into which we divided the crowd in the 1st step ). Slowly read hundreds within one sector . If people are scattered unevenly, take to calculate the area with an average population density. When you have finished, to check you can repeat the same, starting to count from the other end of this area

step 4

Left nothing: take out his phone from his pocket

( if you haven't stolen while you were all considered ), turn on the calculator and multiply the number of sectors on the number of people in one sector ( number, which we learned in step 3 ). What to do with the received number, you decide to enjoy his mathematical talent, show off to friends or to check tomorrow in urban news, what number will officially reported by the authorities, but in any case, you did it. Congratulations!