exam Maths Puzzle Numerical Ability

Find the slope of any line parallel to the line through points (19, 11) and (9, 9).

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exam Other Question

ABCD is a square (ie all sides are equal and all angles and rightangles). CX is made to equal CY (using compasses from the centre C.) Prove that AX = AY. -2root-64 divided by root -16

its equals 4 or -4?