what's the probability of getting a king or a queen from a pack of 52 cards?

You’ll find me on Mercury, Earth, Mars, Jupiter, Saturn, and Uranus. But never Neptune, or Venus. What am I?

If you paint a brown house white it will become a white house. If the stoplight changes from red to green, then the light is green. So, if you throw a white shirt into the Red Sea, what will it become?

The day before yesterday I was 25 and the next year I will be 28. This is true only one day in a year. What day is my birthday?

My grandson is about as many days as my son in weeks, and my grandson is as many months as I am in years. My grandson, my son and I together are 120 years. Can you tell me my age in years ?

What has hands, but can’t clap?

There are two candles. Both will only burn exactly for an hour. How will you use these two candles to measure forty-five minutes?

f you were running a race, and you passed the person in 2nd place, what place would you be in now?

There are people and strange monkeys on this island, and you can not tell who is who (Edit: until you understand what they said - see below). They speak either only the truth or only lies.
Who are the following two guys?
A: B is a lying monkey. I am human.
B: A is telling the truth.

Why do we preferably have round manhole covers and not square ones?