*Here you find all the riddles that use some mathematical ideas. Have some fun!*

#### Part 1 - Chocolate Riddle

I got a chocolate bar for Julian. Since he also likes maths, he has to solve this riddle to get it. The chocolate is in one of three boxes, red (R), green (G), and blue (B). On box (R), it’s written: *It’s not here*. On box (G), it’s written: *It’s here*. On box (B), it’s written: *It’s not in (R)*. We know that at least one box tells the truth and at least one box is lying. Where is 🍫?

#### Part 2 - Solution of Chocolate Riddle

Watch the video to see the explanation of the solution of the riddle.

#### Part 3 - Cake Riddle

I baked a squared cake and I planned to split it into 4 equal squared pieces for tonight. But after leaving it unattended for just a few minutes, the cat stole one of the squares. Can I still cut the remaining cake into 4 pieces of the same shape and size?

#### Part 4 - Solution of Cake Riddle

Watch the video to see the explanation of the solution of the riddle.

#### Part 5 - Princess Riddle

The little princess has three friends: the rose, the sheep, and the fox. They all live on a little planet. They want to visit Earth. The little spaceship just fits the princess and one friend. They can make several journeys. However, the sheep can never be left alone with the fox because the fox would eat the sheep. And the rose cannot be left with the sheep since it would be eaten as well. How can the princess bring all her friends savely to Earth?

#### Part 6 - Solution of Princess Riddle

Watch the video to see the explanation of the solution of the riddle.

#### Part 7 - Clock Riddle

At midnight the three arms of the clock are aligned. When will that happen again?

#### Part 8 - Solution of Clock Riddle

Watch the video to see the explanation of the solution of the riddle.

#### Part 9 - Autumn Riddle

Two tree talk about how many leaves they have left. However, they are limited what they can say.

#### Part 10 - Solution of Autumn Riddle

Let’s quickly sketch the solution: