There was an aeroplane crash, every single person died, but two people survived. How is this possible?

Count the number of triangles in the below picture?

If you’ve got me, you want to share me; if you share me, you haven’t kept me. What am I?

The more of this there is, the less you see. What is it?

They do not possess flesh or feathers or scales or bone
But still, they are blessed with fingers and thumbs of their own.

I have Rs.50 and I spend it in the way as below.

A mathematics teacher took exams for his students. Out of the total students, 25% passed both the tests included in the exam. However, only 42% were able to clear the first test.

Can you find out the percentage of those students who passed the first test and also passed the second test?

A sundial has the fewest moving parts of any timepiece. Which has the most?

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?

I was born in a small house and I live in it all alone. No windows and no doors have been assigned to my house. The only way I can go out is by breaking through the walls of my house.

Who am I?