exam Maths Puzzle Numerical Ability

Find an equation of the containing the pair of points (0,7) and (5,2).

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exam Other Question

Find three consecutive integers such that the product of the first and second is 36 less than the product of the second and third.
I tried x
x+1
x+2 but did not get any further :( Dave and Sam are racing in the Dallas NASCAR Race. Dave is traveling at 187 mph and Sam at 193 mph. How long will it be before Sam is 3 miles ahead of Dave?