If I put in one canary per cage, I have one bird too many. If I put in two canaries per cage, I have one cage too many. How many cages and canaries do I have?

Different lights make me strange by changing me into different sizes. What am I?

People make me, save me, change me, raise me. What am I?

It belongs to you, but other people use it more than you do. What is it?

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?

When we see 2 but call 10?

My location can be determined by the below rebus.
So where am i ?

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

How can you make the following equation true by drawing only one straight line: 5+5+5=550 ?

What is a word made up of 4 letters, yet is also made up of 3. Sometimes is written with 9 letters, and then with 4. Rarely consists of 6, and never is written with 5.