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Orders of Magnitude Quiz
Exact number? Who cares! Just get the right order of magnitude.
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Last updated: September 26, 2025
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| First submitted | July 21, 2025 |
| Times taken | 59 |
| Average score | 53.3% | Report this quiz | Report |
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1. How many people have walked on the moon?
1
10
100
1,000
2. How long ago did the dinosaurs live?
1 million years
10 million years
100 million years
1 billion years
3. How long can a parrot live?
1 year
10 years
100 years
1000 years
4. How long is the international Space Station?
1 football field
10 football fields
100 football fields
1000 football fields
5. How many people are killed by orcas every year?
0
1
10
100
6. How many blocks in the Great Pyramid of Giza?
1,000
10,000
100,000
1,000,000
7. How many synapses in a human brain?
100 million
1 billion
100 billion
100 trillion
8. How many trees on Earth?
1 billion
100 billion
1 trillion
100 trillion
9. How many total species of dogs?
1
10
100
1,000
10. How many grams in a liter of water?
10
100
1,000
10,000
11. What's the value of one Japanese yen in U.S. dollars?
$0.01
$0.10
$1.00
$10.00
12. How far is the Andromeda Galaxy?
10 billion miles
10 trillion miles
10 quintillion miles
10 octillion miles
13. What is the average fingernail growth in a single day?
0.001 mm
0.01 mm
0.1 mm
1 mm
14. How many people were killed in the atomic bombing of Hiroshima?
10,000
100,000
1,000,000
10,000,000
15. How many gold medals did Pakistan win in the 2024 Summer Olympics?
0
1
10
100
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The idea that 10 million were killed is for the birds. We're looking at about half a million even if we count every survivor who had died in the subsequent 78 years as dying due to the bombings - still a huge amount for two bombs, but orders of magnitude smaller than this quiz suggests.
https://en.wikipedia.org/wiki/Atomic_bombings_of_Hiroshima_and_Nagasaki#Cancer_increases