math

complete the pattern
12,18,15,21,18,?,?,?,?,?,?,
13,26,18,36,23,?,?,?,?,?,?,?,
44,54,47,57,50,?,?,?,?,?,?,?,
5,14,15,24,25,?,?,?,?,?,?,?,?

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  1. 12,18,15,21,18,24,21,27,24,30,27(+6,-3)

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  2. 5,14,15,24,25,34,35,44,45,54,55 (+9,+1)

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  3. 12,18,15,21,18,?,?,?,?,?,?,
    12 + 6 = 18
    18 - 3 = 15
    15 + 6 = 21
    21 - 3 = 18
    What do you think the next numbers are?

    13,26,18,36,23,?,?,?,
    13 * 2 = 26
    13 + 5 = 18
    18 * 2 = 36
    18 + 5 = 23
    What do you think the next numbers are?

    Can you see a pattern in the next two groups of numbers? If you post your answers, we'll be glad to check them for you.

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    👤
    Ms. Sue
  4. hints NOT ANSWERS !!!
    +6 -3 + 6 - 3 ....

    *2 + (back 2+5) *2 + (back2 +5)

    +10 -7 +10 -7

    9 1 1 9 1 1 9 1 1 ....

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  5. 12,18,15,21,18,24,21,27,24,30,27,34
    13,26,18,36,23,36,28,41,33,46,38,51
    44,54,47,57,50,60,63,73,66,76,69,79,72,
    15,14,15,24,25,34,35,44,45,54,55

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