Can you find out the missing number?

? 4 5 3 5

9 5 7 10 3

What goes up but never comes down?

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

Can you solve the below algebraic mathematical equation?

(J+O+I+N+T)3 = JOINT

You see a boat filled with people, yet there isn’t a single person on board. How is that possible?

You need to pick one entry from pot A and one from pot B to have a perfect match. Can you do it?

Can you think of a smallest +ve number such that if we shuffle the digits of the number, the new number becomes double the original number?

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?

In the city of Brain Teasers, 5% of people do not list their phone numbers. Now if we select random 100 people from the phone directory, then how many people selected will have unlisted phone numbers?

Two men are in a desert. They both have packs on. One of the guys is dead. The guy alive has his pack open, and the guy who is dead has his pack closed. What is in the pack?