How many Kindles are sold by Amazon?

Kindle is the e-book reader selling by Amazon. Now it has fourth generation with developed e-ink technology. Kindle’s all versions …
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How many stars a person can see in a starry night?

A star is a sphere that holding plasma inside with gravity’s power. Nearest star to the world is sun and …
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How many married people meet first online?

Internet has lots of different usage types. It’s possible to use it for knowledge, share your life or meet with …
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How many people climbed to Mount Everest?

Mount Everest is the tallest mountain in the world. It’s over 29,028 feet. Its growth after Indian plate and Eurasian …
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How many free beaches Barcelona have?

Barcelona is the capital city of Catalonia and the second biggest city of Spain. Every year millions of tourists are …
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How many words a dog can learn?

Dogs are one of the first animals domesticated. They are a subspecies of gray wolf but today it’s hard to …
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How many stone blocks were used for Great Pyramid in Egypt?

Great Pyramid of Egypt or also known as Great Pyramid of Giza is the tallest building human hand made. It’s …
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How many people are obese in USA?

Obesity is the biggest health problem of America. Governments and health organizations are trying to solve this problem and reduce …
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