how long would it take to count 1 trillion dollars using 100 dollar bills by hand? how many people and years?

Answer 1

A trillion dollars is a lot of money - that would be 10 billion 100 dollar bills. If you could count one bill every 2 seconds (without ever stopping to rest, sleep, eat, etc.), you could count $28,800 bills a day, or $10,512,000 bills per year.

So it would take over 951 years to count that much money - not a whole lot of time left over to spend it.

Answer 2

That would be 10 billion $100 bills. Counting 4 per second would take one person about 79 years if you counted continuously - or 79 people one year, counting continuously.