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?

Most people think of me as money. But when they find me in the water, they won’t get any money out of me. What am I?

Four cars come to a four-way stop, each coming from a different direction. They can’t decide who got there first, so they all go forward at the same time. All 4 cars go, but none crash into each other. How is this possible?

What number comes next in this sequence:
7 8 5 5 3 4 4 _

How can you write nineteen in a manner that if we take out one, it becomes twenty?

I look at you, you look at me, I raise my right, you raise your left. What am I?

John can fit six large chocolate boxes or nine small chocolate boxes into a carton. How many cartons will he require to put sixty-six chocolate boxes into?

Complete the table series riddle by finding the number that can replace "??".

Can you solve the tricky chess rebus puzzle below by ciphering the hidden meaning?

Before Mount Everest was discovered, what was the highest mountain in the world?