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.

Women do it once a year after they turn 19 but men get to do it only once in a lifetime. What is it?

How can you make a TV, a bed, a dog, and a car liquid?

Before Mount Everest was discovered, what was the highest mountain in the world?

A car is crossing a 20 km-long bridge. The bridge can support at most 1500kg of weight over it. If somehow, the weight on the bridge becomes more than that, it will break.

Now, the weight of the car is exactly 1500kg. At the midway, a bird comes and sits on the roof of the car. This bird weighs exactly 200 grams.
Can you tell if the bridge breaks at this point or not?

I have a mouth but I don't eat.
I have a bank but have no money.
I have a bed but i dont sleep.
I wave but have no hands.

Who Am I ?

What has hands, but can’t clap?

By including only four matchsticks in below picture, you have to make "Four Triangles And Two Squares"

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?

Our product and our sum always give the same answer. Who are we?