book Maths Puzzle Numerical Ability

Find the slope of the line going through the pair of points.
(8,-3), (-5,-2)

Example: -3/11

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book Other Question

find the square root of 12. Susan wants to have business cards printed. One style will cost $25 plus 2 cents per card. Another style will cost $10 plus 5 cents per card. For how many cards will the cost be th