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 many words can a quill made with the feather of a pigeon write with a 100ml bottle of black ink?

Which is the smallest number that you can write using all the vowels exactly once?

Luis Garavito killed Density x Volume.

Who is Luis Garavito ?

Can you place three balls such that the equation shown in the picture holds true?

What kind of band never plays music?

I have an eye but still cannot see.

Who am I?

John and his team plan to rob a safe. They got just one chance to break the code else the local police will be informed. Below are clues:
A) Exactly one number is perfectly placed: 9 8 1
B) Everything is incorrect: 9 2 4
C) Two numbers are part of the code of the safe but are wrongly placed: 0 9 3
D) One number is part of the code of the safe but is wrongly placed: 1 4 7
E) One number is part of the code of the safe but is wrongly placed: 7 8 3

What does this mean?

CCCCCCC

John was driving a bus and got stuck when passing through an underpass. Then came Jacob with a needle and got the bus out of the underpass.

What did the boy do?