A man dies of old age on his 25 birthday. How is this possible?

You have a three-gallon and a five-gallon measuring device. You wish to measure out four gallons.

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

The dirtier I get, the whiter I look. Who am I?

I noticed one of the words in the oxford dictionary is spelled incorrectly. What about you?

There is a box. The area of its top is 240 square units, the area of the front is 300 square units and the area of the end is 180 square units.

Can you calculate the dimensions of this box with the given data?

Which flower has two lips?

It has five wheels, though often think four, You cannot use it without that one more, You can put things in it, you can strap things on top, You can't find it in the market, but you can still go shop. What is it?

This is a most unusual paragraph. How quickly can you find out what is so unusual about it? It looks so ordinary, you'd think nothing was wrong with it. Actually, nothing IS wrong with it. But it is not as ordinary as you might think. If you think about it for a bit, you will find out why it is truly so unusual. So what is it? What is so unordinary about this paragraph?

I come in different shapes and sizes.
Parts of me are curved, other parts are straight.
You can put me anywhere you like,
but there is only one right place for me.
What am I?