If you counted 1 number per second, it would take 220 years to count to 7 billion.
If you counted 1 number per second, it would take at least 220 years to count to 6.9 billion.
Probably 6
Assuming it takes about 1 second to count each dollar, it would take one billion seconds, or about 31 years and 8 months.
1 billion seconds / 3600 / 24 / 365.2422 = 31.69 years
31.688 years.
One Billion!
If you counted 1 number per second, it would take 63 years to count to 2 billion.
If you counted 1 number per second, it would take 3200 years to count to 100 billion.
If you counted 1 number per second, it would take 220 years to count to 7 billion.
If you counted 1 number per second, it would take at least 220 years to count to 6.9 billion.
Probably 6
Approx. 9 billion years.
By 2050 we should reach around 9.1 billion people.
Assuming it takes about 1 second to count each dollar, it would take one billion seconds, or about 31 years and 8 months.
The sun i approximately 4.57 billion years old and it burned half it's fuel. So it will take approximately another 4.5 billion years for it to run out of fuel completely.
1 billion years