You count out loud, one number per second, without a break. How many years until you reach one billion?

How close can you get? Make your own guess and earn points before you look at the answer.

Guess it yourself and earn points

Show the answer and the reasoning

The answer

31.7 years

Almost 32 years. Counting to one million takes just 12 days.

How to get there

1. 1 billion seconds ÷ 31.5 million seconds per year
2. = 31.7 years

Source: Calculation

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