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25 March, 14:16

During a promotional event a sporting goods store gave a free t-shirt to every 8th customer and free water bottle yo every 10th customer which customer was the first to get a free t-shirt and free water bottle

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  1. 25 March, 14:26
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    The 40th customer was the first to get a free t-shirt and free water bottle

    Step-by-step explanation:

    * Lets explain how to solve the problem

    - A sporting goods store gave a free t-shirt to every 8th customer

    - It gives free water bottle to every 10th customer

    - We need to know which customer was the first to get a free t-shirt

    and free water bottle

    - The position of this person must be a number divisible by 8 and 10

    ∵ The first number divisible by 8 and 10 is 40

    ∴ The customer is the 40th

    * Lets check that by this way:

    - List the 8th positions and the 10th positions to find the common

    position in the two conditions

    # 8th, 16th, 24th, 32nd, 40th, 48th, ...

    # 10th, 20th, 30th, 40th, 50th, ...

    ∴ The 40th customer was the first to get a free t-shirt and free water bottle
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