Which is the smallest number that you can write using all the vowels exactly once?

You and your two friends are working in a multinational company. How can you three find out the average salary of you all without disclosing your own salary to the other two?

Two in a corner, one in a room, zero in a house, but one in a shelter. What am I?

What is the word or phrase?

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?

I am looking for a word that change both gender and number when i add the letter 'S'.

What Word am I Looking For ?

What always comes into a house through the keyhole?

Can you replace the X (both small and big x) with the numbers between 1 to 19 such that all the rows of 3 numbers between X (big x) sum to 23?

This is a classy optical illusion puzzle. What more you can find except bricks in the image below?

Which is faster, Heat or Cold ? Explain.