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Q: What is the next number in sequence 4 12 15 45 48?

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The next number could be 26 The next number could be 12 - - - - - - - - - The next number that is in the sequence is 12.

10 The sequence is given by xn = 60/n

15

Those are the factors of the number 60, in descending order. The next factor is 10.

17?

15

6 12 9 18 15 30 27 54 51

The next number in the sequence is 15. The pattern is as follows: from 1 to 6 is +5, from 6 to 9 +4, from 9 to 12 +3, from 12 to 14 +2, and then from 14 to the answer (15) +1.

The next number in the sequence 3-15-6-30-21 is -207.

21

It is 129.

10,20,30,20

There really is no way of telling, but my guess is 22.

10

.75

-5

12-13-15 etc.... The sequence is add 1 then add 2

The answer would be c. 48.

I think it is -5

The next number after 15 will be 3. You are sequentially adding 9, adding 1, and dividing by 5.

The next number in the sequence would be 25.

5

5

14

The numbers are increasing by 1,4,9,16,25,36.... which are square numbers so the next increase is 49. Making the next number in the sequence 141

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