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

What month of the year has 28 days?

Two-person want to cross a river. Only one boat is present on the riverside that can carry only one person at a time.

However, they still manage to cross the river. How is it possible?

How will you measure 15 minutes using two hourglasses of 7 minutes and 11 minutes respectively?

Why do people go to bed?

I’m tall when I’m young, and I’m short when I’m old. What am I?

I taste better than I can smell. Who am I?

What always comes into a house through the keyhole?

Can you count the number of triangles in the given figure?

I am lying and I always lie. Tell me whether I am lying or telling the truth.