exam Maths Puzzle Numerical Ability

If the lines passing through the points (1,a) and (4,-2) is parallel to the line passing through the points (2,8) and (-7,a+4), what is the value of a?

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exam Other Question

A certain paint mixture sells for $3.40 per liter and contains white and red paint. The white paint is valued at $3.00 per liter and the red at $4.00 per liter. If 10 L of this mixture is needed, how much white and red must be used to make it? The simple interest "I" on a principal of "P" dollars at interest rate "r" for time "t", in years, is given by I = Prt. Find the simple interest on a principal of $6000 at 3% for 2 years. (Hint: 3%=0.03)

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