exam Maths Puzzle Numerical Ability

In parallelogram ABCD, angle A=x degrees and angle B= (3x)degrees. Find m < B

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exam Other Question

the sum of the digit of a two digit no. is 15if the no. formed by reversing the digit is less than the original no. by 27.find the original no. how far apart are the y-intercepts of the line with the equation y=2x+3 and the line that goes through the point (4,2) and has a slope of negative one?