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

Which of the following words don't belong in the group and why?
CORSET, COSTER, SECTOR, ESCORT, COURTS

It can't be seen, can't be felt, can't be heard, and can't be smelt.
It lies behind stars and under hills, And empty holes it fills.
It comes first and follows after, Ends life, and kills laughter.
What is it?

Name the three-letter word that can complete the below words?

A) L O _ _ _ E
B) E D U _ _ _ E
C) _ _ _ E R
D) _ _ _ T L E

How many times in a given day, minutes and hour clock comes in a straight line ?

What is the word or phrase?

You see a boat filled with people, yet there isn’t a single person on board. How is that possible?

Find the next number in the series?
2, 12, 36, 80, 150, 252, 392, _ ?

At a party, there are five people and a whole round cake lying at the centre of the table. Only four people will make a cut and take their piece and the last one will get the remaining piece on the table. How can they make sure that everyone gets a 1/5th of the piece?

They are three errirs in this question. Can you find them?