If I remove one from eleven it becomes Ten and if I remove one from nine also becomes Ten. How?

You stand in front of two doors. A guard stands next to each door. You know the following things: one path leads to paradise, the other leads to death. You cannot distinguish between the two doors. You also know that one of the two guards always tells the truth and the other always lies. You have permission to ask one guard one question to discover which door leads to paradise. What one question would you ask to guarantee you enter the door to paradise?

In a basket of apples,
when counted in twos, there was one extra
when counted in threes, there were two extra when counted in fours, there were three extra
when counted in fives, there were four extra
when counted in sixes, there was five extra.

However, if the apples were counted in sevens, no extra apple was left. Can you calculate the minimum number of apples that were present in the basket?

Two-person want to cross a river. Only one boat is present on the riverside that can carry only one person at a time.

However, they still manage to cross the river. How is it possible?

Can you make numbers like 24, using numbers 3,3,7 & 7 with any arithmetic operator?

0 0 0 = 6
1 1 1 = 6
2 2 2 = 6
3 3 3 = 6
4 4 4 = 6
5 5 5 = 6
6 6 6 = 6
7 7 7 = 6
8 8 8 = 6
9 9 9 = 6

You can use any mathematical symbols in the space provided to make all above algebraic expressions true.

The measurement of time, That can't be found on a clock, But can be looked upon on a map.

Who is He ?

There is a movie name hidden in the picture that is attached with this question. Can you find out which movie is it?

My cousin lives in one story house in Antarctica. His house is made the of-of sandstone. what is the color of stairs?

My friends called me Iron59 because my parents are a chemist and a mathematician. What is my real name?