what does the below rebus means?

What is at the end of a rainbow?

How can a man go eight days without sleep?

Which is faster, Heat or Cold ? Explain.

An artist while painting a scenic beauty, decides to paint three layers of blue colour on the sky.

Which layer will go on the first?

In a school, there are four subjects. Seventy percent of students study English, seventy five percent of students study Science, eighty five percent of students study Mathematics and eighty percent of students study Spanish.

Can you calculate the percentage of students that study all four subjects?

You have a three-gallon and a five-gallon measuring device. You wish to measure out four gallons.

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

What has one eye, but can’t see?

First, think of the colour of clouds. Next think the colour of snow. Last, think of the colour of the moon. Now, what do cows drink?