**Smart Puzzle - 28 September**

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-hands? (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 ?

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25,000,000,000 easy

ReplyDelete5 Power 5000000000

ReplyDelete25 billion it's so easy

ReplyDeletethat would be if you *added* them all.

DeleteMultiplying would be 5^5,000,000,000 (assuming you are only multiplying those who actually have 5 fingers - safe assumption, since we're only counting 5 of the 7 billion people in the world). This would be the same as 10^log(5)*5,000,000,000 which is a number with roughly 3.5 billion digits

According to WolframAlpha:

ReplyDelete5 to the power 5,000,000,000

is roughly

9 with 3,494,850,022 zeros behind it.

0

ReplyDeleteThere can be atleast one man without hands on the earth, making the answer ZERO!!!(X*0=0)

ReplyDelete