I have feet, but no legs. Which animal Am I?

What is black when you buy it, red when you use it, and gray when you throw it away?

A mathematician couple was having a Frappuccino in Starbucks sitting opposite to each other. Suddenly the guy noticed the text written on the paper in front of them and exclaimed that it was wrong. The girl denied it and said it is appropriate. Both are correct. What is written on the paper?

I’m tall when I’m young, and I’m short when I’m old. What am I?

Decode below three cipher riddles:

26 L of the A
7 D of the W
1000 Y in a M

Can you find the thief by just looking at the picture below?

Find the smallest sentence with all the English alphabet.

A boy was at a carnival and went to a booth where a man said to the boy, "If I write your exact weight on this piece of paper then you have to give me $50, but if I cannot, I will pay you $50." The boy looked around and saw no scale so he agrees, thinking no matter what the carny writes he'll just say he weighs more or less. In the end the boy ended up paying the man $50. How did the man win the bet?

I am a type of room you cannot enter or leave. Raised from the ground below, I could be poisonous or a delicious treat. What am I?

What two things can you never eat for breakfast?