O_er_t_o_

Complete the missing letters of the given word.

Luis Garavito killed Density x Volume.

Who is Luis Garavito ?

What number does the below three word/phrase identify and why?
1. Deck
2. Year
3. Singing in the Rain

Can you solve the tricky chess rebus puzzle below by ciphering the hidden meaning?

What does man love more than life, hate more than death or mortal strife; That which contented men desire; the poor have, the rich require; the miser spends, the spendthrift saves, and all men carry to their graves?

Make eight squares by moving only two matchsticks.
Note- Square can be of different sizes.

What is the next number in the series?

15 29 56 108 208 ?

A King wants to send the diamond ring to his girlfriend securely. He got multiple locks and their corresponding keys. His girlfriend does not have any keys to these locks and if he sends the key without a lock, the key can be copied in the way. How can King send the ring to his girlfriend securely?

Decode the below four famous ciphers:

8P of the SS
1M of the E
1S of the SS
60M in 1H

What famous saying does this rebus mean?

COME SERVED <---
COME SERVED
COME SERVED
COME SERVED
COME SERVED