exam Maths Puzzle Numerical Ability

A line contains the points (a-4,b+4) and (a,b) What is the slope of the line?

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exam Other Question

A mutual fund has 14 stocks in its portfolio. On a given day 2 stocks move up, 9 stay the same and 3 move down. In how many ways can this happen? A bus leaves a station at 1 p.m., traveling west at an average rate of 44 mi/h. One hour later a second bus leaves along the same route, traveling at 54 mi/h. At what time will the two buses be 274 mi apart?