exam Maths Puzzle Numerical Ability

Find the slope of the line passing through the points (8, -3) and (1, 4).

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exam Other Question

JOhn does a task in 30 minutes, Jennifer does in 45 minutes and Caryn in 1 1/2 hour. How long would it take for the three of them to do it if they do it together? WHAT IS THE LCM OF 9,7,6?