How can one talk without saying a single word?

Nine marbles are arranged in the image below. Can you slide two marbles to form a square?

You are an expert on paranormal activity and have been hired to locate a spirit haunting an old resort hotel. Strong signs indicate that the spirit lies behind one of four doors. The inscriptions on each door read as follows:

Door A: It's behind B or C
Door B: Its behind A or D
Door C: It's in here
Door D: It's not in here

Your psychic powers have told you three of the inscriptions are false, and one is true. Behind which door will you find the spirit?

While sitting in the Car, John suddenly finds that one of the wheels was missing. John noticed that a killer is approaching towards him. John cannot get out of the car.

How will John escape?

A man dies of old age on his 25 birthday. How is this possible?

Prove that twice of ten is the same as twice of eleven.

By including only four matchsticks in below picture, you have to make "Four Triangles And Two Squares"

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?

Which tank will fill first?

Which digit occurred maximum times between the number 1 and 1000?