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Q: What number can go into 15 and 27?

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The number at the midpoint of these two numbers is (15 + 27)/2 = 21

3(5-x) = 27 15 - 3x = 27 15 - 3x + 3x = 27 + 3x 15 = 27 + 3x 15 - 27 = 27 - 27 + 3x -12 = 3x -4 = x To check 3(5- -4) ? 27 15 - -12 ? 27 15 + 12 = 27

1, 3, 5, 9, 15, 27, 45, 135.

The number 3

180*15/100 = 27

810, 1620, 2430, 3240, 4050 +810 . . .

No, just these: 1, 3, 5, 9, 15, 27, 45, 135.

1 and 3

47 is.

15 with remainder 15.

It is: 15

3

42

The answer is 27. 10+15=25. 25+2=27.

The number which lies in between 6 and 27 is 16.5 which is derived by (6+27)/2.

1, 3, 5, 15.

Only the number 1.

41 is the prime number in this list.

621

x - 15 = 27

The word increase means the problem is addition: 15 + x = 27. Reorder the problem so that it is subtraction: 27 - 15 = x and solve for x. X = 12.

3, 9, 1, 27

7 (has no multiples)

1 and 3

11 is prime.