Book Maths Puzzle Numerical Ability

the angles of a triangle are in ratio 2:3:7 find the measure of the largest angle

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Book Other Question

find the value of a and b if y=2 and y=3 are roots of the equation 4y^2-3ay+2b=0 the coordinate of one end of diameter of a circle are (5,-7). If coordinates of the centre is(7,3) find the coordinate of the other side of the circle