Many have heard it, but nobody has ever seen it, and it will not speak back until spoken to. What is it?

This is a most unusual paragraph. How quickly can you find out what is so unusual about it? It looks so ordinary, you'd think nothing was wrong with it. Actually, nothing IS wrong with it. But it is not as ordinary as you might think. If you think about it for a bit, you will find out why it is truly so unusual. So what is it? What is so unordinary about this paragraph?

One day, John and his friends were playing around. Jacob hit something with a Pin and it popped. John's dad came into the room that very moment, but he wasn't mad. In fact, he was smiling. What did Jacob hit?

What can you hold in your right hand, but never in your left hand?

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

Can you solve this tricky maths equation problem by replacing it? mark with the correct symbol?

19834 -----: 187
15921 -----: 153
17561 -----: 139
13734 -----: ???

Count the number of triangles in the given picture.

Can you divide the below-given shape into four equal and identical pieces?

There is one thing that goes round the house and also inside the house but never even share a brief touch. What is it?

In the four images below, can you find the odd one out?