An express train takes 3 seconds to enter the tunnel which is 1 km long.
If it is travelling at 120 km an hour, how long will it take to pass completely through the tunnel?

How many pluses should we put between the digits of 987654321 to get a total of 99, and where?

Speaking of rivers, a man calls his dog from the opposite side of the river. The dog crosses the river without getting wet, and without using a bridge or boat. How?

Can you place three balls such that the equation shown in the picture holds true?

If eleven plus two equals one, what does nine plus five equal?

The day after tomorrow will be three days before Tuesday. Can you find out what is today?

I know a nine-letter word having only one vowel.
Do you ?

What is at the end of a rainbow?

By moving exactly three matchsticks can you make the below equation true.It can be solved by 3 ways.

Shyla was sleeping in her apartment when suddenly a robber broke into her house. He asked her to stay quiet and started looting the cash and jewelry. Suddenly the landline phone started ringing. The robber pointed a gun at Shyla and asked her to pick up and talk without giving away the situation.

She picked up the phone and it happened to be her husband. She spoke, Is it an emergency darling? Do give me a call when your flight lands, I will prepare your favorite food that will help you relieve the stress. Then she hanged up.

10 minutes after, the police arrive at the scene and catch the robber. How did the police know about the robbery?