What is always in front of you but can’t be seen?

Replace the question mark with the correct number below.

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?

We know that the number 7 is the prime followed by a cube. Which next number is also a prime followed by a cube?

A man was going to bleach his socks because they had gotten muddy the day before. As he was pouring the bleach into the washing machine, he spilt some on the floor. He got some cleaning fluid and mopped it up with a rag. Minutes later he was dead. What killed him?

In the city of Brain Teasers, 5% of people do not list their phone numbers. Now if we select random 100 people from the phone directory, then how many people selected will have unlisted phone numbers?

What's a single-digit number with no value?

What has one eye, but can’t see?

A Child was born in Lahore, Pakistan. Still, the child is not a Pakistani citizen. why?

Consider all the numbers between 1 and 1 million. Among all these numbers, there is something very special about the number 8 and the number 2202. What is it?