Pi is a student who loves mathematics very much. It was his grandfather, whom he loved very much, who instilled in him a love of mathematics. Pi, who opened the chest he received after his grandfather's death, reads the letter that his grandfather wrote to him. His grandfather tells him that he left him a map. According to this map, he will collect passwords from the cities he visited and receive the gift his grandfather left him. 

Team Of Irina Dimzova Trenevska

Pi looks at the map in his hand and his first stop is the city of OHrid in North Macedonia. Pi sets off without wasting any time. Arriving in Ohrid with great excitement, PI sees a rectangular door at the entrance of the city. In order to enter through the door, he has to calculate the area of this door with a width of 15 and a height of 20 and find 5 percent of the result. Pi, who finds the area of 300, immediately finds 5 percent of it as 15 and enters the door. Upon entering Ohrid, Pi, who sees the Ohrid lake immediately, is fascinated by this magnificent beauty. He loves the beauty of the city of Ohrid, which is built on the shore of the lake. While walking in the city, he sees a church on a hill and thinks that the password might be there. This is St.Jovan Kaneo, the church with the most beautiful view of the city. Touring the church, Pi admires the view of the church. Just as he thought, the first piece of the password is here. Having received the password, Pi sets out for his new route on the map, Prundu, with the beautiful view of Ohrid in mind.

Team Of Irina Dimzova Trenevska

Our hero Pi is very excited about his new town.This city is very special for him because he knows that Pi, Lucia Apolzan who likes to travel, is from Sibiu.Pi saw a huge door in the shape of a diamond at the entrance to Sibiu.The side of this door is a diamond with diagonal lengths of 9 and 4 meters. In the letter he found on the door he says he finds the area of this diamond and finds the number of elements of a set with as many subsets as the number found and tells the officer.Pi found that the area of the square is 16. Find the number of elements of a set with 16 subsets as 4 and tell the officer.The door opens and takes the other part of the password. He knows that the best preserved is the Brukental Palace and immediately goes on a tour there.On the way back, visit Bran Castle and Peleș Castle.Pi Sinaia, who is very hungry, fills his stomach with the famous and very delicious cheese donuts.Pi, who has been on the road for days, takes a shower in the baths with healing waters in Căciulata.Time for Pi to sleep.While he sleeps, he dreams of the extraordinary places he will see in Brașov, the next stop.

Team of Manole Mariana

Our hero Pi's current destination is the district of Çorlu in the Tekirdağ province. As he approached Çorlu, he encountered a giant gate. This time, the gate was in the shape of a deltoid with diagonal lengths of 4 and 5 meters. At the entrance of the gate, there was a letter left for him, instructing him to find the area of the deltoid and to tell the assigned personnel the prime number he obtained by substituting x into the function f(x) = 3x + 7. Following the instructions, he calculated the area as 10 and found the prime number 37 by substituting it into the given function. He communicated the number to the personnel, who opened the gate and let Pi in and received another piece of the passphrase.

In Çorlu, Pi learned that there were interesting places to visit, such as Republic Park, Youth Park, and the Upside-Down House. Finally, he visited the Atatürk House and discovered that it was an exact replica of the house where Atatürk was born in Thessaloniki. This increased his excitement even further. And happily continued his journey towards Bursa.

Team of Ercan Ekinci

Our hero Pi came to Green Bursa, the first capital of the Ottoman Empire. On his way to Bursa, which is located on the skirts of Uludağ, he encounters a parallelogram-shaped gate at the entrance of the city. One of the sides is 8 meters long, and the height of this edge is 7 meters, and he sees a paper pasted on this door. It is written on this paper that if he finds the area of the parallelogram, calculates the number of integer divisors of this number and tells the officer, the door will open. Finding the area of 56 square meters, Pi found the number of integer divisors as 16 and told the officer and the door opened. Climbing to Tophane and watching the Bursa plain, Pi wandered around the historical Hanlar District and the Grand Bazaar, visited the Ulucami and admired it. Pi, who is hungry, drank his tea under the shade of plane trees in historical Kozahan after tasting the unique taste of Bursa, Iskender kebab. He came to the Green Tomb by passing the Irgandı Bridge, one of the 4 bridges with bazaars in the world. When he saw the octagonal structure and the green Kütahya tiles that gave the tomb its name, he was amazed by the tomb and set off for his next stop, Kütahya, excited to see the tiles.

Team of Gülizar Erdem

Our hero Pi is very excited about his new city. This city is very special for him, as he knows that Pi Evliya Çelebi, who loves to travel, is from Kütahya. Pi saw a huge door in the form of a right triangle at the entrance of Kütahya. The base length of this door is 4 meters and the height is 4 meters. In the letter he found at the door, it is written that he finds the area of this right triangle and finds the number of subsets of a set with as many elements as the number found and tells the officer. Pi found the area of the triangle to be 8. It finds the number of subsets of a set with 8 elements as 256 and tells the officer. The door opens and takes the other piece of the password. He knows that the best preserved Zeus Temple in Anatolia and the world's first trade exchange building are in the ancient city of Aizanoi, and immediately goes for a tour there. On the way back, he visits the Tile Museum and Germiyan Street. Pi Kütahya, who is very hungry, fills his stomach with the famous and very delicious pancakes. Pi, who has been on the road for days, takes a shower in the baths with healing waters. It's time for Pi to sleep. While he sleeps, he dreams of the extraordinary places he will see in Eskişehir, the next stop.

Team of Zeynep İşlek 

Pi finally arriving in Eskişehir, Pi sees a huge trapezoidal door with a floor length of 6x8 and a height of 7m at the entrance of Eskişehir. Now he knows that he will take the first step for the password by calculating the area of this door. Pi calculates the area as 49m2, but this is not enough to open the door. The attendant at the entrance of the door asks him to find out how many last digits of the factorial number 49 are zero and tell him. Pi, who immediately finds the answer of 10, tells the officer and enters Eskişehir. The green waters of Badger dazzle Pi. Pi completes his walk along the badger coast and heads towards the place on the map, namely the fairy tale castle. Coming to the fairy tale castle, Pi is fascinated. Fairy Tale Castle consists of 26 towers, 8 towers and 18 towers. Masal Castle, which houses a sample of almost all of Turkey's historical towers, is a fascinating place for children. When pi, who visited the whole fairy tale castle, climbs to the top viewing terrace, he sees an envelope again, realizes that it is the envelope containing the password, and immediately takes it. According to his grandfather's map, his current stop is not a new city. It is another stop in Eskişehir. Surprised by this, Pi starts to move on the streets of Eskişehir with excitement.

Team of Hatice Gül-Taş

Examining his map thoroughly, Pi moved towards his second stop in  Eskişehir. Of course he is excited. He came to the historical Odunpazarı Houses. He encountered a square-shaped door here. He took the envelope in front of the door and opened it. It is written in the letter that find the area of the door with a side length of 3 meters, than the password will be obtained by multiplying the result by the degree of the polynomial P(x)=9+8x-5x²-x³ and dividing by the leading coefficient. Pi found the area of square as 3x3=9 . He multiply 9 by 3; the degree of P(x) and he got 27. Divided the result by the leading coefficient, -1, to got -27. Entered the password. The door opened and he took the next piece of the password. He started to visit the Odunpazarı Houses, which are full of museums. He visited the Wax Sculptures Museum, Hafız Efendi Mansion, Atlıhan Handicrafts Bazaar, Eskişehir Independence Museum, Meerschaum Museum, Contemporary Glass Arts Museum and Woodworks Museum in admiration. The beauties he saw in Eskişehir and the living examples of history made his head dizzy. Pi who was very hungry, did not neglect to eat the famous Çi pastry of the city. With the smell of history on his mind and the taste of pastry on his palate, he set out for the new route of his map, Şanlıurfa.

Team of Eylem Çınar

When pi opened his eyes he has just came from Şanlıurfa. He wasvery happy to come to this city that has hostes many civilizations. Pi saw a gigantic isosceles triangular door different from the previous one. He found  note. In this note, it is written that the perimeter of the door he saw was 36 m and the unequal side was 10 m. He learns that the number of binary combinations of the area of this isosceles triangle is the password to open the door. Since pi loves mathematics very much, he found the area of the triangle as 60, then found the number of binary combinations of 64 as 2016 and told the doorman the password. The door opens and the other piece of the password is handed over to him. They started to visit Göbeklitepe, known as the zero point of history, and Balıklıgöl, which has a spiritual meaning. Pi, who also visited the city museum, is fascinated while looking at the statues found in Göbeklitepe. He does not neglect to visit the world's largest mosaic in the mosaic museum, which is another museum of the city. When Pi is hungry, he fills his stomach with the famous dishes of Şanlıurfa, Çiğköfte and Kebab. After visiting the ruins of Harran University, the first university in the world, he spends a night in the dome houses of Harran, which have become the symbol of the city. 

Team of Müslüm Kaya

Pi has arrived in Baku, the last stop of Şanlıurfa with its delicious food in mind. In Baku, a door in the form of an equilateral triangle with sides of 4 meters greeted him. He said that in order for Pi to enter Baku, he had to calculate 3√3 times the area of this gate. Pi immediately calculated the area of the triangle as 4√3 and multiplied the area by 3√3 to find the answer 36 and told the officer. The gates of the city of Baku have been opened and the last part of the password has been completed. Pi decides to visit Baku first and then combine the password. He goes first to the Inner City. The Inner City is a historic old city surrounded by walls on the shore of the Caspian Sea. Pi adores the beauty of the Inner City. While walking through the Inner City, he sees a tall castle. This castle is the historical Maiden's Castle. It is the first place in Azerbaijan to be included in the UNESCO World Heritage list. Finally, Haydar goes to ALİYEV's headquarters where he begins to assemble the pieces of the password. . 

Team of Lala Talibova 

When he puts the pieces together, 'Thematic Mathematics', which is about his favorite subject, mathematics, falls into the page of the eTwinning project and starts to examine the project pages with curiosity and excitement. Examining all the works, Pi realizes that this is the real surprise when he sees his own photo in the project. Pi is actually a part of this beautiful project, even if he doesn't realize it...

All students of the project