580 primary school teachers and students rent cars, a total of 12 cars, 60 people for each car, 25 people for each car, just full. How many cars for each car? Urgent

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• 3. There are two numbers whose greatest common divisor is 7 and the least common multiple is 21. These two numbers are
• 4. The greatest common divisor of two positive integers is 7 and the least common multiple is 105
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• 9. The greatest common factor of two numbers is 1, and the least common multiple is 323. These two numbers are () and () or（ The greatest common factor of two numbers is 1, and the least common multiple is 323. These two numbers are () and () or () and ()
• 10. The greatest common divisor of AB is 12, the least common multiple is 72, a = 36, B =?
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• 12. Xiaoming and Xiaojun went to buy greeting cards. Xiaojun bought 2.5 times as many as Xiaoming. After Xiaoming bought another 15 cards, the two bought the same number of cards. How much did each buy Why use 2.5-1?
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• 15. There are two sequences: 1, 3, 5, 7, 9 11,13,15,17,19,…… 1993 and 1,4,7,10,13,16,19 1993, find the number of the same number
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• 17. lg20+log100（25）=_______ The solution of equation 2log3 (x) = 1 / 4 is________ log5(2)+2/3lg8+lg5lg20+(lg2)²=_________
• 18. If you dream of becoming a spaceman when you____ up ,get started now!A spaceman n_____ a strong body and keen mind .You still have a long way to g_____ .Do you know what Shenzhou VI spaceman are able to do?Shenzhou VI spaceman are able to l______ upside down .They do this not just during s______ ,but also when eating and going to the toilet.Before f____ into space,they had lots of p____ .Echn upside-down training l____ for many days.They also have to know every part of the spaceship and how it w_____ .If something g____ wrong,they must know how to repair it. 1. ABCD and apqr are parallelogram, P, Q, R are on AB, AC, ad respectively, AP = 2qc, s quadrilateral ABCD = 36, then s quadrilateral apqr= A20 B24 C16 D18 2. Given a: B = C: D, then the middle term of the ratio of a & sup2; + C & sup2; and B & sup2; + D & sup2; is A、ac+bd B、ad+bc C、ad+cb D、ad+cd
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• 20. It takes 6 minutes for a part to be processed, 5 minutes for B and 4 minutes for C. now, 2220 parts are processed by 3 people in the same time, and each person is assigned How many parts of the mission? In proportion