The greatest common factor of 63 and 21
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- 3. A triangle, an angle of 30 degrees, an angle of 60 degrees, of course, there is another 90 degrees, so what is the proportion of the sides of the triangle? What's more, is there any link to cosin, cosin and other related angle issues?
- 4. Students went to plant trees. The first group planted 18 trees in 30 minutes, and the second group planted 12 trees in 18 minutes. Which group planted trees faster?
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- 12. What is the least common multiple of 63 and 42?
- 13. Which of 30, 55, 78, 201, 405, 720, 969, 1008 are multiples of 2 or 3
- 14. To make 872 () a multiple of 55
- 15. In 6, 30, 55, which are multiples of 6
- 16. What is a multiple of 99
- 17. Calculate the square of 1 - the square of 2 + the square of 3 - the square of 4 + the square of 19 - the square of 20
- 18. X + 5x = 6, what is x equal to
- 19. Let's know that x equals 9, then how much is 6x plus 5x minus 1
- 20. How to solve the equation