How can you tell a raw egg from a hard-boiled egg?

You enter your friend's room. He is not in his room. Although you see that on the bed there are two dogs, five cats, two giraffes and three pigs. Also, a couple of chickens and ducks are flying in the room.

Calculate the number of legs standing on the floor.

John is 45 years older than his son Jacob. If you find similarities between their ages, both of their ages contain prime numbers as the digits. Also, John's age is the reverse of Jacob's age.

Can you find their ages?

Solve the equation in the image by looking at the pattern closely.

Place the numbers from 1 to 9 in the circles in a manner that each side of the triangle sums up to 17.

What's a single-digit number with no value?

If eleven plus two equals one, what does nine plus five equal?

What has lots of eyes, but can’t see?

What has one letter and starts with an E?

What do the following words have in common?

Assess
Banana
Dresser
Grammar
Potato
Revive
Uneven
Voodoo