What is the word or phrase?

How many words can a pen with half refill write?

The picture shows the dice results in each couple of throws. If they are actually following a pattern, can you find out the missing one?

Take away my first letter, then take away my second letter. Then take away the rest of my letters, yet I remain the same. What am I?

Use only one mathematical symbol and all numbers (0-9) to get a sum of 99

I am the one who remains awake when you sleep. But I need to rest when you awake. Who Am I?

Two old friends, Jack and Jill, meet after a long time, and discussing as:

Jack: Hey, how are you, man?

Bill: Not bad, got married and I have three kids now.

Jack: That's awesome. How old are they?

Bill: The product of their ages is 72 and the sum of their ages is the same as your birth date.

Jack: Cool..But I still don't know.

Bill: My eldest kid just started taking piano lessons.

Jack: Oh, now I get it.

How old are Bill's kids?

We have four gears with below features=> Both Gear A and D has 60 teeth=> Gear B has 40 teeth=> Gear C has 20 teeth=> Every two minutes, Gear B makes 25 full turns.What is the relative speed of Gear A and Gear B?

Railroad Crossing, look out for the cars. Can you spell that, without any R's ?

4 fathers, 2 grand-fathers and 4 sons went to watch the movie.What is the minimum number of tickets they need to buy ?