exam Maths Puzzle Numerical Ability

The steepness, or grade, of a road is expressed as a percent. If a road rises 3 feet for every 24 horizontal feet, what is the sope of the road? what percent grade is this?

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Sum this series of numbers: 1+4+7+10+13+16+....+8938+8941+8944. How do you find the number of integers and how do you solve? I got 1491 integers [1+(n-1)*3 = 8944 and Sum [n/2*(1+8944)]= 13,336,995. The figure illustrates the apparatus for a tightrope walker. Two poles are set a(52 feet) apart, but the point of attachment P for the rope is yet to be determined. If the total