You measure my life in hours
I serve you by expiring
I vanish faster when I am thin
and slower when I am thick
The wind is my energy
What am I?

A girl says this to her best friend: “I was born in 1955, and I celebrated my 17th birthday last weekend.” Her best friend thinks she’s lying, but she’s actually correct. How is that possible?

Christina is practising her dance steps along with her friends. In a particular sequence, all of them form a row. At that point, Niharika is standing in the 4th position from either end of the row.
Can you find out how many girls are practising together?

How many people must be gathered together in a room, before you can be certain that there is a greater than 50/50 chance that at least two of them have the same birthday?

You Throw The Outside, Cook The Inside
Eat The Outside, Throw The Inside.

What Is It?

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

Can you find the number?

What is more useful when it is broken?

A sundial has the fewest moving parts of any timepiece. Which has the most?

A certain street contains 100 buildings. They are numbered from 1 to 100. How many 9's are used in these numbers?

A girl is twice as old as her brother and half as old as her father. In 50 years, her brother will be half as old as his father. How old is the daughter now?