What is the riddle which can be asked all day with a different correct answer each time.

Can you solve the below algebraic mathematical equation?

(J+O+I+N+T)3 = JOINT

A frog is at the bottom of a 30-meter well. Each day he summons enough energy for one 3-meter leap up the well. Exhausted, he then hangs there for the rest of the day. At night, while he is asleep, he slips 2 meters backwards. How many days does it take him to escape from the well?

Prove that twice of ten is the same as twice of eleven.

Imagine a box with two cogwheels, one big with 24 teeth and one small with 8 teeth. The big one is firmly attached to the center of the box which means it does not turn or move while the small one rotates around the big one.

How many times do you think that the smaller wheel will turn compared to the box when it turns once around the big one?

A boy and a girl are sitting on the porch.
"I'm a boy," says the child with black hair.
"I'm a girl," says the child with red hair.
If at least one of them is lying, who is which?

Cristina was born in 1888. She just had her 30th birthday today how did that happen?

Take one out and scratch my head, I am now black but once was red. What am I?

Today, I celebrated my 32nd birthday but I was born in 1972.
How is this possible?

1 rabbit saw 9 elephants while going to the river. Every elephant saw 3 monkeys going toward the river. Each monkey had 1 parrot in each hand. How many animals are going towards the river?