What has one eye, but can’t see?

If "P" means "-", "Q" means "/", "R" means "+", and "S" means "*" then find the value of the following:

21 Q 7 R 9 S 10 P 13

Find the next number in the series.
1 10 24 43 67 ?

One night, a woman receives a call from the police. They tell her that her husband was murdered and that she should come to the crime scene as soon as possible. The woman drops the phone, shocked, and drives 20 minutes to the crime scene. As soon as she reaches the crime scene, the police arrest her and she is convicted of murder. How do the police know she committed the crime?

What number do you get when you multiply all of the numbers on a telephone's number pad?

What jumps when it walks and sits when it stands?

What has six faces, but does not wear makeup, has twenty-one eyes, but cannot see? What is it?

I travel all around the world but always stay in the corner. What am I?

There were three women in all the swimming costumes!
One was happy and the other two were sad!
The happy one was crying and the sad ones were smiling.
Why was this?

What does this rebus mean?

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