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?

Can you replace the question mark with the correct letter?

6 + 6 + 6 = N
7 + 7 + 7 = E
8 + 8 + 8 = R
0 + 0 + 0 = ?

When does a USA Potato change its nationality?

I have a clock(12-hour format) and both the needles of the clock overlap at 12:00.
After how much time, they will overlap again?

How can you drop a raw egg from a height onto a concrete floor without cracking it?

Can you find out which number multiplied by itself will give the output as 12345678987654321?

If a zookeeper had 100 pairs of animals in her zoo, and two pairs of babies are born for each one of the original animals, then (sadly) 23 animals don’t survive, how many animals do you have left in total?

What has a ring but no finger?

Buy me, smell me or deliver me, I do not change.

Who am I?

Can you move 2 matchsticks to form four equal sized squares.