I shave every day, but my beard stays the same. What am I?

You walk into a room that contains a match, a kerosene lamp, a candle and a fireplace. What would you light first?

What makes this number unique: 8,549,176,320?

Considering the below equation:

V + II - VI = 10
IV - X + VIII = 20
IV - VII + VI = 30

Then, I + II + III = ?

There is a square of a particular number which when doubled, becomes 7 more than its quarter.

Can you find the number?

Find three whole, positive numbers that have the same answer when multiplied together as when added together.

If in a car race, the man who came two places in front of the last man finished one ahead of the man who came fifth, how many contestants were there?

Which English verb becomes past tense just by rearranging the letters?

One is to three as three is to five and five is to four and four is the magic number.
What is the pattern?

John went to meet his friend Jacob, but when he was about to reach the main gate, John notices that Jacob had a mighty dog who was fastened to the tree. The chain is long enough that it allows the dog to reach the main gate.

How can the John reach the main gate?