What does it mean?

What does a man do only once in his lifetime, but women do once a year after they are 29?

You have a square. What you have to do is cut and reassemble the square such that you create a Red Cross sign that has the same volume as that of the square.

If six children and two dogs were under an umbrella, how come none of them got wet?

On a certain day, John celebrated his birthday. Two days later, his older twin brother Jacob celebrated his birthday.

Is this even possible? How can it be?

A crime was committed at baker street. Ibrahim Dakota who was shot in the stomach was the main suspect. Sherlock questioned the suspect. The conversation started as:
Sherlock: What's your story, Ibrahim?
Ibrahim: I was walking around baker street and suddenly a man from the back shot me. I ran as fast as I could to save my life".
Sherlock: That is enough (and ask the police to arrest him).

Why does Sherlock think he is the murderer?

What does the below rebus riddle means?

What has many keys but can’t open a single lock?

Can you think of any three-dimensional shape that comprises of exactly two surfaces?

Can you find out who is the kidnapper in below Picture and why, Explain ?