It walks on 4 when its young, walks on 2 when it's older, and walks on 3 when its very old?

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

Krish is 45 years old and his mother Crishtina is 73 years old.

Can you find out how many years ago, his mother was three times his age?

When monkey rotate the gear, which mark will be hit 1 or 2 ?

What are the next two letters in the following series and why?
W A T N T L I T F S _ _

*Hint: Check Puzzle Title

The square root of number 121 is "11". What is the square root of the number "12345678987654321."?

How can one talk without saying a single word?

What is the Surname of Barbie Doll?

There are three boxes which are labeled as Rs100, Rs150, and Rs200. One box contains two notes of Rs. 50. The second box contains one note of Rs50 and one note of Rs100 The third box contains two Rs. 100 notes. All boxes are labeled incorrectly.

What is the minimum number of boxes you must check in order to label all boxes correctly?

Create a number using only the digits 4,4,3,3,2,2,1 and 1. So i can only be eight digits. You have to make sure the ones are separated by one digit, the twos are separated by two digits the threes are separated with three digits and the fours are separated by four digits