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.

By removing one matchstick and adding one matchstick, can you convert the word "ZOO" to an animal name?

1 + 9 + 8 = ?
considering, 28 + 8 + 92 = 10

You walk into a creepy house by yourself. There is no electricity, plumbing, or ventilation. Inside you notice 3 doors with numbers on them. Once you open the doors you will die a particular way. Door No.1 You’ll be eaten by a lion who is hungry. Door No.2 You’ll be stabbed to death. Door No.3 There is an electric chair waiting for you. Which door do you pick?

A Shopkeeper collects 71 rupees in the form of 20 paisa and 25 paisa.
He collects a total of 324 coins.

Can you tell me how many number of 20-paisa and 25-paisa he got?

Can you Find and name the hidden bird in the picture below ?

Quickly Solve this riddle

7 - 4 + 3 * 0 + 1 = ?

Can you find the dog hidden in a group of pandas?

Can you solve the maths in the below-given picture equation?

Four cars come to a four-way stop, each coming from a different direction. They can’t decide who got there first, so they all go forward at the same time. All 4 cars go, but none crash into each other. How is this possible?