exam Maths Puzzle Numerical Ability

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1) In a triangle, the sum of the interior angles is 180 degrees. If angle A is three times as large as angle B, and angles B and C sum to 90 degrees, what is the measur

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Mr. Santos invested 50,000 pesos, part of which at 5% per year and the rest at 6% per year. his annual income from the two investments was 2000 pesos. How much did he invest at each rate? Find the equation of the line containing the point (-1,3) and perpendicular to hte line 2x+4y=-1