Can you identify if it's a murder or a suicide ?

Assume there are approximately 5,000,000,000 (5 billion) people on Earth. What would you estimate to be the result, if you multiply together the number of fingers on every person's left hand? (For the purposes of this exercise, thumbs count as fingers, for five fingers per hand.) If you cannot estimate the number then try to guess how long the number would be.

For this puzzle, you might have to find logic in something illogical. But hey, it's fun and a healthy little break from your strenuous puzzle-solving sessions.

Can you decipher the meaning in the following cluster of letters?

ITIT,NCENTCENT

2, 3, 5, 9, 17, _ What is the next number in the sequence?

You are playing a game with your friend Jack. There are digits from 1 to 9. You both will take turn erasing one digit and adding it to your score. The first one to score 15 points will win the game.

Would you want to play first or second?

PS: The sum should be exactly 15.

What's the next in the series?

H, Be, F, S, Mn, Kr, In, Gd, Tl, ?

What word does this rebus represent?

meta meta
meta meta

In the given figure, move three matchsticks so that the resulting figure contains two rectangles.

Find the value of "?" in the ball picture Riddle below:

Begin with a word, five letters to my name,
Remove the first and last but I am the same
Take out my middle and still, I remain.
What word am I?