Why Aeroplane windows are round?

There’s a one-story house in which everything is yellow. Yellow walls, yellow doors, yellow furniture. What colour are the stairs?

I had an infinite supply of water and 5 litres and 3 litres jars.

How would you measure exactly 4 litres in the least number of steps?

Below rebus represent famous DiCaprio movie. Can you name it?

Before Balboa discovered the Pacific Ocean, which was the largest ocean before that?

I am looking for a word that change both gender and number when i add the letter 'S'.

What Word am I Looking For ?

In 1990, a person is 15 years old. In 1995, that same person is 10 years old. How can this be?

There are 2 sand hourglasses.

The small one can measure 5 hours and the large one can measure 7 hours.

How can we measure 16 hours with 2 sand hourglasses running together ?

What does it mean?

There's a day, that comes around once a year.
To celebrate the man, you hold dear.
He gave you life, love and will pick you up if you fall.
When it comes to guys like him, He's the best of all.
Who is he?