exam Maths Puzzle Numerical Ability

It takes Peter 15 minutes longer than Charles to mow the lawn by himself. Together, they can mow the lawn in 18 minutes. How long will it take Charles to mow the lawn by himself?

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exam Other Question

Determine the slope of a line that goes through the points (1,3) and (-2,5) Write the following as an algebraic expression then simplify

a) The sum of three consecutive integers if x is the first consectutive integers.

b)The perimeter of a square with side length 3x +1.