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

I came first on earth but second on the heaven.
I also came twice in a week but found just once in a year.
I stay away from months but you can find me in February.

What am I?

A cat had three kittens: Snophy, Topsy and Jorden. What was the mother's name?

What does this simple rebus mean?

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.

You can see three almost identical images below. Can you spot the odd one out from them?

In the given picture, in how many ways can you read the word "Tiger"?

A girl has as many brothers as sisters, but each brother has only half as many brothers as sisters. How many brothers and sisters are there in the family?

How many triangles can you find in this given picture?

This puzzle is for Harry Potter fans. Do you know why Tom Riddle is called Lord Voldemort?