If all Goats are Sheep and all Sheep are Deers, are all Deers Goats ?

Until it is measured, not known. Yet how you miss it when it has gone. What is it?

You have a roll of cloth 1km long. You have a machine which cuts this roll into pieces of 10-meter-long cloth.

How long would it take for the machine to cut the roll if each cut took 4 secs?

In the addition below, all digits have been replaced by letters. Equal letters represent equal digits and different letters represent different digits.
ABCABA
BBDCAA
ABEABB
ABDBAA
------- +
AAFGBDH
What does the complete addition look like in digits?

The day after tomorrow will be three days before Tuesday. Can you find out what is today?

Give it food and it will live; give it water and it will die.

Which alphabet letter is a question?

Whats the next number in the below number sequence pattern.

P is the father of Q and S is the son of R. T is the brother of P and has a daughter U. If R is the sister of P, then what is the relation between U, Q and S?

In the picture that is attached with this question, you can find a square which comprises of four little squares inside it. Consider this square to be made with matchsticks. You have to remove two matchsticks such that only two squares remain instead of five.How will you do it ?