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7 March, 02:20

Alice takes 1/3 of the pennies from the jar. Then Brett takes 1/3 of the remaining pennies from the jar. Finally, Carla takes 1/3 of the remaining pennies from the jar, leaving 40 pennies in the jar. How many pennies were in the door at the start?

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  1. 7 March, 05:47
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    135 pennies

    Step-by-step explanation:

    x = pennies in the door at the start

    x-1/3x-1/3 (x-1/3x) - 1/3 (x-1/3x-1/3 (x-1/3x)) = 40

    x = 135

    Proof: 135-45-20 = 40

    135-45=90

    90=30=60

    60-20=40
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