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26 February, 11:46

A string of decorative lights is 25 feet long. The first light on the string is 16 inches from the plug. The lights on the string are spaced 4 inches apart. How many lights are there on the string?

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  1. 26 February, 12:13
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    25 feet = 25 x 12 = 300 inches

    First light is at 16 inches.

    300 - 16 = 284 inches

    Find the rest of the bulbs:

    284 : 4 = 71

    Total number of lights = 71 + 1 = 72

    Answer 72 lights
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