7. 8, 10, (), 22, 38
twelve
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- 2. Finding rules in mathematics 2,5,10,17, (), 37 Not only the answer, but also the explanation
- 3. Who knows the law of this series: 1, 2, 3, 6, 12, 23, 44 1. 2, 3, 6, 12, 23, 44, x, 164 what is the law?
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- 6. Interesting paradise of Mathematics Q: it costs 66 yuan for mom to buy 2kg meat and 3000 fish, and 102 yuan for Dad to buy 4kg meat and 3kg fish. Please calculate the meat. How much is each kilogram of fish?
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- 8. Sharing cattle by borrowing cattle Grandfather Chen had 17 cows. He wanted to give them to his three sons, so he said to them, "there are only 17 cows in group fights. Your three brothers divide them according to my method. The eldest brother gets 1 / 2, the second brother gets 1 / 3, and the third brother gets 1 / 9." Who can think of a way for them to share the cattle? Hope to use mathematical solution. It's better to write in detail
- 9. 1 fun park good times 3 = fun park good 1, what number does fun park stand for
- 10. Page 42 PEP Edition A barrel of oil weighs 58kg and is used up in three days. One third of the oil is used in the first day, the remaining two-thirds is used in the second day, and the oil used in the third day is 6kg less than three seventh of Zhonghe used in the previous two days!
- 11. -2. - 8, - 18, - 32, - 50, find the rules Please be more specific, Please be more specific. What's the 20th number, how to list the formula, and what are the symbols of *, ^
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