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.

In a fruit store, there was a unique weighing machine that was made to weigh only cherries and strawberries as they were priced the same.

Other fruits like watermelons or mango had different machines as they were expensive.

A man successfully buys watermelons at the price of cherries. How?

What type of tree can I carry in my hand?

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

What 5-letter word typed in all capital letters can be read the same upside down?

I can be cracked, made, told, and played. What am I?

In the given figure, you can see that four match sticks are used to form a square. Can you form five squares by using six matches?

When 99 is considered higher than 100?

A clock loses 10 minutes each hour. If the clock is set correctly at noon, what time is it when it reads 3 PM?

How can you make number one disappear by adding something to it?