What does this rebus riddle means ?

Luis Garavito killed Density x Volume.

Who is Luis Garavito ?

I shave every day, but my beard stays the same. What am I?

In a Society, there are over 100 flats.

Flat 1 is named the first flat.
Flat 2 is named the second flat.
Flat 3 is named the third flat. And So On.....

A visitor decides to walk through all the flats, and he finds all the flats except flat 62.
Anmol later founds that the locals of the town have given it another name.

What is the name of the Flat?

What will be the best approach to finding all the prime numbers less than 75 that leave an odd reminder when we divide them with 5?

Find the smallest sentence with all the English alphabet.

John went to buy some expensive, foreign chocolates. He only had Rs 100 with him. When he reached the shop, he got out and know that on those chocolates, there was a 15% import duty and 5% VAT.

How much worth chocolate should he buy so that he can accommodate it in Rs 100?

Which wheel of car does not rotate when you turn your car right?

Before Mount Everest was discovered, what was the highest mountain in the world?

During which month do people sleep the least?