What mathematical symbol can be put between 5 and 9, to get a number bigger than 5 and smaller than 9?

What month of the year has 28 days?

Can you find out what is missing?

1 3 5
2 4 ?

Hint: It's not six. Think out of the box.

What happened when the wheel was invented?

Accidentally, two trains are running in the opposite direction and enter a tunnel that is 200 miles long. A supersonic bird that has fled the lab and taken shelter in the tunnel starts flying from one train towards the other at a speed of 1000 mph. As soon as it reaches the second train, he starts flying back to avoid collision and meets the first train again at the other end. The bird keeps flying to and fro till the trains collide with each other.

What is the total distance that the supersonic bird has traveled till the trains collided?

What is harder to catch the faster you run?

What has a bottom at the top?

How can you make number one disappear by adding something to it?

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

When it is alive we sing, when it is dead we clap our hands. What is it?