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African elephants have longer lifespans than most other animals on earth. They can live 70 years or more. Yet they require very little sleep, only about 2 hours each day. They often sleep standing or leaning against a tree or rock.
In contrast, koalas sleep 22 hours each day. Their diet of eucalyptus leaves (high in toxins) requires a lot of energy to break down. Koalas have a lifespan of 12 years. Despite having a much shorter lifespan, about how many more years of sleep does a koala have? |
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China leads the world in rice production at 212,843,000 tonnes in 2021. China's population in the same year was 1.412 billion.
Vietnam ranks 5th worldwide with 43,852,730 tonnes in 2021, and its population was 97.47 million. What is the ratio of China’s rice production per capita to that of Vietnam’s rice production per capita? |
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In 2022, Sweden has the world's highest human rights index by V-Dem of 0.97. "It captures the extent to which people are free from government torture, political killings, and forced labor; they have property rights; and enjoy the freedoms of movement, religion, expression, and association." North Korea has the lowest human rights index of 0.02.
Back in 1789, Haiti had the lowest index of 0.07. In 2022, Haiti's index registers at 0.63. While this is a significant improvement, there's still a lot of work to be done. What is Haiti's human rights index percent increase? |
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On May 17, 2003, Immaculate Baking baked the world's biggest cookie. It was 102 feet wide and weighed over 40,000 pounds.
Mrs. Fields cookie measures about 3 inches wide and weighs 8 ounces. You can order online a dozen of the "signature dozen original sized cookies" for $40. Based on weight only, how much should the biggest cookie cost using Mrs. Fields pricing? |
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In 2022, world sheep numbers reached 1.296 billion head, with China having the largest sheep population, followed by India and Australia.
One sheep provides about 4.5 kg of wool per year. This amount is enough to make 6 sweaters. If one wool sweater sells for $80, what is the worldwide annual revenue? |
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Being closest to the Sun, Mercury has the fastest orbital veloctiy of 47.4 km/s. Its distance from the Sun is 57.9 million kilometers.
Neptune, farthest away, has an orbital velocity of 5.4 km/s. Its distance from the Sun is 4,515 million kilometers. An orbital period, measured in Earth days, is the time it takes for a planet to orbit the Sun. Earth's orbital period, or year, is about 365 days. How many times longer is Neptune's "year" compared to Mercury's? |
