Math Problem Solving

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in a following pattern, one hexagon takes 5 toothpicks to build, two hexagons take 11 toothpicks to build, and so on. How many toothpicks would it take to build (a) 10 hexagons? (b) n hexagons?

a 50
b ???

  • Math Problem Solving -

    I am not yet certain of the pattern, Frankly, I would have expected
    one hexagon takes 6
    two hexagon takes 11
    three take 16
    and n would take 6+(n-1)5
    10 hexagons would take 51

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