What goes up but never comes down?

What is at the end of a rainbow?

Kareena is older than Bipasha. Bipasha is younger than Karishma and younger than Katrina. Katrina is older than Kareena and Alonso, who are older than Karishma.If Alonso and Kareena are twins, who's oldest?

The person who makes it has no need for it. He who purchases it does not use it. The person who does use it does not know they are. What is it?

How many times can you subtract the number 5 from 25?

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 ?

I welcome the day with a show of light, I stealthily came here in the night. I bathe the earthy stuff at dawn, But by noon, alas! I'm gone.

I am a prime number.
The double of myself is equal to the square of me.

which number am I?

In the given figure, move three matchsticks so that the resulting figure contains two rectangles.

Which point will the car reach to go out?