It belongs to you, but other people use it more than you do. What is it?

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?

You can hear me, but you can't touch or see me.

What am I?

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

Can you find the number?

What is the next number in this matchsticks series riddle?

Aman has 1.15 rupees in his pocket. There are a total of 6 coins in his pocket.

When his friend asked him for a change, he could not give change for a rupee and five paisa.

Can you tell which coins he has?

He digs out tiny caves and stores gold and silver in them. He also built bridges of silver and made crowns of gold. They are the smallest you could imagine. Sooner or later everybody needs his help, yet many people are afraid to let him help them. Who is he?

Can you make numbers like 24, using numbers 3,3,7 & 7 with any arithmetic operator?

John and Jacob are twin brothers. One of them is a liar whereas the other one is a truth-teller.

I called their home number and one of them picked up.
I asked. 'Does John lie?' The person replied with a yes.

Whom did I talk with, John or Jacob?

What is the Surname of Barbie Doll?