What is the longest word in the dictionary?

Two old friends, Jack and Jill, meet after a long time, and discussing as:

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?

I am weightless, but you can see me. Put me in a bucket, and I'll make it lighter. What am I?

Can you spot the man between the coffee bean in the picture below ?

There was an aeroplane crash, every single person died, but two people survived. How is this possible?

Transform the word THINK into BRAIN while changing only one letter at a time in a manner that each of the word in the process is a real word!!!

What is the next number in the series?

15 29 56 108 208 ?

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

Find out the missing number in the picture attached:

What 8 letter word can have a letter taken away and it still makes a word. Take another letter away and it still makes a word. Keep on doing that until you have one letter left. What is the word?