It's a protector.
It sits on a bridge.
One individual can see directly through it, while others wonder what it hides.

What is it?

Can you find out which number multiplied by itself will give the output as 12345678987654321?

A red house is made out of red bricks. A yellow house is made out of yellow bricks. And, a blue house is made out of blue bricks. So, what is a greenhouse made of?

The doctor advised his patient to take a tablet after every fifteen minutes. He gave him five tablets in total.

How much time will he take to have all the five tablets?

You need to move three matchsticks to form three squares. Can you do it?

What does below chemistry rebus means?

At a bar, three friends, Mr Green, Mr Red and Mr Blue, were having a drink. One man was wearing a red suit; one a green suit; and the other a blue suit. 'Have you noticed,' said the man in the blue suit, 'that although our suits have colours corresponding to our names, not one of us is wearing a suit that matches our own names?' Mr Red looked at the other two and said, 'You're absolutely correct. What colour suit is each man wearing?

There's one "sport" in which neither the spectators nor the participants know the score or the leader until the contest ends.

What is it?

What occurs twice in a week, once in a year but never in a day?

Can you solve below mathematical equation?

2^1234 - 2^1233