What is the common multiple of 6.12.20.30.42.56.72

The common multiple of 6.12.20.30.42.56.72 is 2520

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1. The least common multiple of 12,20,30,42,56,72
2. With the common factor, the common multiple solution application problem everybody helps, thanks! 1, a number divided by 56 more than 48, if divided by 72 more than 64, this number is at least? 2. There is a pile of apples, which are divided into 7kg, 8kg, 9kg and 10kg, with 3kg left? 3. No.1, No.2 and No.3 buses in a city leave at different times. No.1 bus leaves every 3 minutes, No.2 bus leaves every 5 minutes, No.3 bus leaves every 8 minutes. At 3:00 p.m., No.3 bus leaves from the terminus. What's the time for the next No.3 bus to leave from the terminus at the same time? 4. There is a rectangular timber with a length of 140 decimeters, a width of 56 decimeters and a height of 28 decimeters. How many kinds of saw hairs are there when it is sawed into a square with equal volume? If the square required to be sawed is the largest, how many sections can it be sawed into? 5. A batch of bricks, 45 cm long and 30 cm wide, at least how many such bricks can be used to make a square?
3. 21 and 35 common factors
4. If the diagonals of the parallelogram ABCD intersect at point O, △ AOB is an equilateral triangle and ab = 3, then the area of the parallelogram ABCD is () and the perimeter is（ Tell me why
5. The radius of circle a is 10 cm, which is twice the diameter of circle B. how many times is the circumference of circle a?
6. Calculation and simplification Square of 1 (- 1 / 2) + 3 / 4 - (2-radical 3) + |2-radical 3| 2 | radical 6-radical 2 | + | radical 2-1 | - | 3-radical 6| 3. Given | a | = 2-radical 2, | B | = 3-2 times radical 2, and a + B = radical 2-1, find the values of a and B
7. What are the functions of dashes
8. Use four identical squares to form a rectangle with an area of 100 square centimeters. How many centimeters is the circumference of the rectangle!
9. A and B solve the equations ax + 5Y = 15 ①, 4x + by = - 2 ② together. Because a misread the letter A, we get the equations ① x = - 3, y = - 1. B misread the letter B, The solution to the equations is x = 5, y = 4. Try to calculate the value of a to the power of 2010 + (- 0.1b) to the power of 2009
10. Simple calculation of 7 / 12 + (5 / 6-3 / 8) times 2 / 11
11. The least common factor and the greatest common multiple of 40, 56 and 84
12. Common multiple of 20 30 42 56 72 90 Come on, Kuai
13. Decompose 64.72.115.98.56.39.45.88.91. Into prime factors
14. (1) Find the greatest common factors 8 and 56 88 and 11 5 and 17 for each group of numbers below Find the least common multiple of 12 and 48 7 and 8 6, 24 and 36 Fill in the appropriate number in () as required It's a multiple of two and a multiple of three 26(　） 7（　）24 4（　）3（　） It's also a multiple of 2.5.3 63（　） 5（　）0　 6（　）7（）
15. The greatest common factor of 91 56
16. The greatest common factor of 19 and 21
17. Least common factor of 14 and 35 least common factor of 19 and 8
18. 38 and 57 common factors fast
19. What is the greatest common factor of 19 and 57?
20. In the following four groups, only the common factor 1 is () a, 19 and 57 B, 24 and 14 C, 26 and 91 D, 15 and 32