Two old friends, Jack and Bill, meet after a long time.

Three kids
Jack: Hey, how are you, man?
Bill: Not bad, got married and I have three kids now.
Jack: That's awesome. How old are they?
Bill: The product of their ages is 72 and the sum of their ages is the same as your birth date.
Jack: Cool..But I still don't know.
Bill: My eldest kid just started taking piano lessons.
Jack: Oh, now I get it.

How old are Bill's kids?

What is wrong in the below Picture?

What runs around the whole yard without moving?

Move four matchsticks to the below square to form three squares?

John was born on March 5, 1970, in Delhi, India. Jacob was born 25 days before John. The year when they took birth, Republic Day fell on Monday.

Can you find out on what day was Jacob born?

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?

By removing one matchstick and adding one matchstick, can you convert the word "ZOO" to an animal name?

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

Complete the series by replacing "?" with the correct number.

ST ND RD TH '?'

I have an eye but still cannot see.

Who am I?