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

There is a square of a particular number which when doubled, becomes 7 more than its quarter.

Can you find the number?

Two fathers and two sons went fishing one day. They were there the whole day and only caught 3 fish. One father said, that is enough for all of us, we will have one each. How can this be possible?

Look at this sequence from top to bottom. What is the next number in the sequence?
1
11
21
1211
111221
312211

What mathematical symbol can be put between 5 and 9, to get a number bigger than 5 and smaller than 9?

When you say goodbye, I am what you need to tie.
I come as a couple and go wherever you run.
Who am I?

An equation has been laid down using a few matchsticks. However, as you can see, the equation is not correct. Can you correct the equation if you are allowed to add or remove 5 matchsticks?

Can it be possible to build a house that has all its four walls facing towards the South?

What can you hold in your right hand, but never in your left hand?

John is 45 years older than his son Jacob. If you find similarities between their ages, both of their ages contain prime numbers as the digits. Also, John's age is the reverse of Jacob's age.

Can you find their ages?