exam Maths Puzzle Numerical Ability

The bottom of a 13-foot long ladder is placed 5 feet away from a wall so that the ladder rests against the top. Assuming the wall is perpendicular to the ground, what is the height of the wall?

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exam Other Question

What are the equal spaces between numbers called when we make a number line? Solve by using the quadratic formula. 5x^2+5x=3

a. -5+-square root 85 over 10

b. -5+-square root 85 over 5

c. -5+-square root 40 over 5

d. -5+-square root 40 over 10