exam Maths Puzzle Numerical Ability

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?

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The reciprocal of a number plus the reciprocal of twice the number equals 3/10. Find the number. Solve :

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