Luis Garavito killed Density x Volume.

Who is Luis Garavito ?

What does this below rebus puzzle mean?

I’m tall when I’m young, and I’m short when I’m old. What am I?

A boy was locked in a room by some robbers. All that is in the room is a piano, a calendar, and a bed. The room is locked from the outside. What does he eat, drink, and how does he escape and get out?

I come in different shapes and sizes.
Parts of me are curved, other parts are straight.
You can put me anywhere you like,
but there is only one right place for me.
What am I?

what does the below rebus means?

In a guessing game, five friends had to guess the exact numbers of apples in a covered basket.
Friends guessed 22, 24, 29, 33, and 38, but none of the guesses was correct. The guesses were off by 1, 8, 6, 3, and 8 (in random order).

Can you determine the number of apples in a basket from this information?

The square root of number 121 is "11". What is the square root of the number "12345678987654321."?

Do You See It?

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