math

a fireman stood on the middle step of a ladder, shooting water into a burning building, as the smoke lessened, he climbed up 3 steps, and continued his work, the fire got worse, so he had to go down 5 steps, later he climbed up the last 6 steps and was at the top of the ladder. how many steps were there?

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  1. 3 - 5 + 6 = 4

    The middle step must be step 4.

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