A number is not only a factor of 18, but also a multiple of 3. How many Xie are there

The number is not only a factor of 18, but also a multiple of 3. There are four such numbers: 3, 6, 9 and 18

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1. A number is not only a factor of 18, but also a multiple of 18______ ．
2. Find the sum of multiples of 3 in the factor of 18
3. The sum of multiples of 3 in the factor of 18
4. The multiple of 1-103 has () the factor of 1-1018 is () What is it
5. It's a multiple of 18 and a factor of 72. What's the number
6. A number is a factor of 72 and a multiple of 18. How many such numbers are there?
7. A number is a multiple of 18, which is also a factor of 18. Guess what the number is______ ．
8. A number is a factor of 72 and a multiple of 18. How many such numbers are there
9. How many factors are there
10. What is the greatest common factor of 123 and 41?
11. What is the number that is a factor of 18 and a multiple of 3? Urgent ~
12. Find the law, 23618 find the fifth number. A.128 b.148 c.168 d.188
13. The following column numbers are given: 2, 43, 678, 131021 Then the nth number is______ (expressed by an algebraic expression containing n)
14. Find rules: 0,1,2,3,6,7,14,15,30,,, 63,64128 Fill in the numbers in brackets
15. 31 30 15 14 7 () () 1 7 8 14 15 21 22 () () this is to find rules
16. Find the rule: 3,6,7,14,15,30
17. There is a column of numbers: 1, 6, 11, 16, 21... According to the arrangement of numbers, the 80th number is ()
18. The number of this column is arranged according to a certain rule. Fill in the number according to the rule: 1,5,21,85341, () Urgent need
19. There is a column of numbers, 2, 5, 8, 11, 14 Then 104 is the () th number in this column A. 33B. 32C. 34D. 35
20. There is a column of numbers, 2, 5, 8, 11, 14 Then 104 is the () th number in this column A. 33B. 32C. 34D. 35