In how many ways can you arrange 10 books on a shelf?

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

3.6 million ways

3.6 million ways for ten books.

How to get there

1. 10 × 9 × 8 × … × 1 = 3,628,800

Source: Calculation

More estimation questions

How many watts does your brain use?How many litres of water does a single cup of coffee take, from the bush to the cup?A high-speed train runs non-stop to the Moon at 300 km/h. How many days does the trip take?How many kilometres does the Moon travel along its orbit in one day?How many Olympic swimming pools of rain and snow fall on Earth every second?

Diese Frage auf Deutsch

Pixcess is the free estimation game without ads. How Pixcess works