The peacock is a bird that does not lay eggs. How do they get baby peacocks?

You are given a cube that is made with the help of 10x10x10 smaller cubes summing up to a total of 1000 smaller cubes. You are asked to take off one layer of the cubes.
How many remain now?

How can you take 2 from 5 and leave 4?

Accidentally, two trains are running in the opposite direction and enter a tunnel that is 200 miles long. A supersonic bird that has fled the lab and taken shelter in the tunnel starts flying from one train towards the other at a speed of 1000 mph. As soon as it reaches the second train, he starts flying back to avoid collision and meets the first train again at the other end. The bird keeps flying to and fro till the trains collide with each other.

What is the total distance that the supersonic bird has traveled till the trains collided?

Next Number in the Series,

5, 16, 49, 104, ?

If eleven plus two equals one, what does nine plus five equal?

Which tank will fill first?

What is the coolest letter in the alphabet?

When I got four, I have it none.
When I got two, I have it some.
When I got none, I have it all.

What is it?

Which is Odd One Out and why?

4377

3954

9862

8454

9831