I’m tall when I’m young, and I’m short when I’m old. What am I?

Pronounced as 1 letter, And written with 3, 2 letters there are, and 2 only in me. I’m double, I’m single, I’m black blue and grey, I’m read from both ends, and the same either way. What am I?

You need to move three matchsticks to form three squares. Can you do it?

There is something which you can be arrested for attempting but not for successfully completing.

Why is it against the law for a man living in Delhi to be buried in Mumbai?

How can you spell "White of an egg" in one word?
Hint: I know you can spell coke, poke, and joke.

Three cars are driving on a track that forms a perfect circle and is wide enough that multiple cars can pass anytime. The car that is leading in the race right now is driving at 55 MPH and the car that is trailing at the last is going at 45 MPH. The car that is in the middle is somewhere between these two speeds.
Right now, you can assume that there is a distance of x miles between the leading car and the middle car and x miles between the middle car and the last car and also, x is not equal to 0 or 1.
The cars maintain their speed till the leading car catches up with the last car and then every car stops. In this scenario, do you think of any point when the distance between any two pairs will again be x miles i.e. the pairs will be x distance apart at the same time ?

Prove that twice of ten is the same as twice of eleven.

I add 5 to 9 and get 2. The answer is correct, so what am I?

Andrew sees a very rare bird named "Ruppell's vulture". Soon Andrew was dead. Can you explain the mystery, Mr. Sherlock?