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kristina95

  • 3 years ago

6, 12, 9, 18, 15 a. 45 c. 12 b. 23 d. 30

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  1. kristina95
    • 3 years ago
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    make a conjecture about the next number in the sequence

  2. Butterfly16
    • 3 years ago
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    Well you can see that 6*2=12, and then 12-3=9 And you can see that 9*2=18, and 18-3=15 So, what is 15*2?

  3. kristina95
    • 3 years ago
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    30

  4. mathmate
    • 3 years ago
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    Hint: 6, 12, 9, 18, 15, ?

  5. Butterfly16
    • 3 years ago
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    Yup, so 30 would be your next number. :o) Good job!

  6. kristina95
    • 3 years ago
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    thanks! @Butterfly16

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