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?

How many points are there on the globe where, by walking one mile south, then one mile east and then one mile north, you would reach the place where you started?

If nine thousand, nine hundred nine dollars is written as $9,909,
how should twelve thousand, twelve hundred twelve dollars be written?

One is to three as three is to five and five is to four and four is the magic number.
What is the pattern?

By using 'because' continuously three times, can you make an English statement ?

What has six faces, but does not wear makeup, has twenty-one eyes, but cannot see?

John is 45 years older than his son Jacob. If you find similarities between their ages, both of their ages contain prime numbers as the digits. Also, John's age is the reverse of Jacob's age.

Can you find their ages?

The Little ant seems to be always confused. Do you know why?

In this image, you can see three almost identical Doraemon images. Can you spot the odd one out from them?

How many times can you subtract the number two from the number fifty?