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Estimation question

How many times does a heart beat in 80 years?

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

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The answer

2.9 billion beats

Almost 3 billion beats without a single break.

How to get there

  1. 70 × 60 × 24 = about 100,000 per day
  2. 100,000 × 365 × 80 = about 2.94 billion

Source: Calculation with 70 beats per minute

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