What number do you get when you multiply all of the numbers on a telephone's number pad?

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.

What is common among 11, 69, and 88?

A Scientist was fifty years old in the year 2000 but he was forty years old in the year 2010. How can this be possible?

PS: It has a logical answer.

A pond had 60 fish, out of which, all but 20 died.
How many fishes are now present in that pond?

Can you make a fire with just a single stick?

There are 2 people near the river and both of them want to get on the other side. The boat can only take one of them. But they got across.
How?

Irene killed hundreds of people mercilessly and yet the police were not able to put her behind the bars. Why?

Can you place six matchsticks in a manner that each of the matchsticks is in touch with the other five matchsticks?

In a rainy season, one day 3 huge ladies walked under a normal-sized umbrella.
The umbrella is not huge enough to accommodate all 3 ladies yet not a single lady got wet. Why?