Among 12 identical looking golf balls there is one that is defective in weight. It is either heavier or lighter than the standard one. You have a balance. You can only weigh 3 times to find out which one is defective and whether it is heavier or lighter.
NOTE : isA mosh ha2ol l ay 7ad eno 7al sa7 elle 7al 3′alat bas howa elle ha2olo eno 3′alat lkn law mosh 2olt fa e3raf enk sa7 … ya3ni intersting b2a we kda 3shan a5er problem 
Good Luck
Here is the solution of the 6th problem
# Name Wore Deck Colour
1 DJ Skinf Lint 2 red
2 DJ Park’n Ride 3 yellow
3 DJ Slam Dunk 1 green
4 DJ Jam Jar 4 blue
Overall Rank:
Aya Magdy 65
Nessma Ossam 65
Doha Seliem 60
Omnia 55
Ahmed Yousef 25
shohanda 25
Hafez 20
TeCNoYoTTa 20
Eman 20
Shreif Hassan 20
Mohamed Mosaed-Ghost 15
5olio 15
Mostafa Shokrof 15
Enas Mohey 15
Aya Yahia 10
Ahmed Yossre 10
Proud To Be Muslim 5
Yasmine Madkour 5
Mohamed Adel Mohamed 5
Simo 5
Abu-Bakr Taha 5
Olive oil 5
Shimaa Ahmed 5
Amr Saqr 5
Aya Ahmed 5
During a recent music festival, four DJs entered the mixing contest. Each wore a number, either 1, 2, 3 or 4 and their decks were different colours. DJ Skinf Lint came first, and only one DJ wore the same number as the position he finished in. DJ Slam Dunk wore number 1. The DJ who wore number 2 had a red deck and DJ Jam Jar didn’t have a yellow deck. The DJ who came last had a blue deck. DJ Park’n Ride beat DJ Slam Dunk. The DJ who wore number 1 had a green deck and the DJ who came second wore number 3. Can you determine who came where, which number they wore and the colour of their deck?
NOTE : Tomorrow is the last day in the daily challenge 
here the solution of the 5th proble
Date : 24
Number Of student in each group : 4, 3 and 2
Question: Does any group contains one person
Overall Rank:
Aya Magdy 55
Doha Seliem 55
Nessma Ossam 50
Omnia 35
Ahmed Yousef 25
Hafez 20
shohanda 20
TeCNoYoTTa 15
Mohamed Mosaed-Ghost 15
Eman 15
Shreif Hassan 15
5olio 15
Mostafa Shokrof 10
Enas Mohey 10
Aya Yahia 10
Ahmed Yossre 10
Proud To Be Muslim 5
Yasmine Madkour 5
Mohamed Adel Mohamed 5
Simo 5
Abu-Bakr Taha 5
Olive oil 5
Shimaa Ahmed 5
Amr Saqr 5
A large cake is to be devided between two children. They are both anxious to have the cutting done fairly so that the other doesn’t end up with a bigger piece.
How can the children be sure that they have received a true half of the cake?
I visited my math teacher last February. My teacher told me there were 3 groups of students came to his house on that day already. He also told me each group had different numbers of students. He said it was a coincidence that the product of the numbers of students in each group was equal to the visiting date (today’s date). He asked me if I knew how many people came in each group
I looked at the calendar and found out that there might be 4 possible answers. So I asked my teacher a question. He replied: No. Then I gave him the correct answer. Do you know on what date I visited my teacher? How many people came in each group? What was the question I asked my teacher?
Here is the solution of the 4th problem
5 Spiders
6 Cicada
7 Dragonflies
Overall Rank:
Aya Magdy 40
Nessma Ossam 40
Omnia 35
Doha Seliem 35
Ahmed Yousef 25
Hafez 20
TeCNoYoTTa 15
Mohamed Mosaed-Ghost 15
shohanda 15
Mostafa Shokrof 10
Eman 10
Shreif Hassan 10
5olio 10
Proud To Be Muslim 5
Yasmine Madkour 5
Enas Mohey 5
Mohamed Adel Mohamed 5
Simo 5
Abu-Bakr Taha 5
Olive oil 5
Aya Yahia 5
Shimaa Ahmed 5
Amr Saqr 5
Ahmed Yossre 5
A spider has 8 legs. A dragonfly has 6 legs and 2 pairs of wings. A cicada has 6 legs and one pair of wings. Now we have all 3 kinds and a total of 18 insects in a cage. We have a total of 118 legs and 20 pairs of wings. How many insects do we have of each kind?
Here is the solution of the third problem
(0! + 0! + 0! + 0! + 0!) ! = 5! = 120 : )
5olio and ghost have different solutions , see all solutions here
Overall Rank:
Omnia 30
Doha Seliem 25
Aya Magdy 25
Hafez 20
Ahmed Yousef 20
Nessma Ossam 20
TeCNoYoTTa 15
Mohamed Mosaed-Ghost 10
shohanda 10
Proud To Be Muslim 5
Mostafa Shokrof 5
Eman 5
Yasmine Madkour 5
Shreif Hassan 5
Enas Mohey 5
Mohamed Adel Mohamed 5
Simo 5
Abu-Bakr Taha 5
5olio 5
Olive oil 5
Here is the solution of the second problem
only four who solve this one : )
Overall Rank:
