Asked in Maths and Science Reasoning Mock

Four identical glasses are shown below. One glass is empty, and the other 3 glasses are ¼ full,1/2 full, and ⅘ full of water, respectively. If the water were redistributed equally among the 4 glasses, what fractional part of each glass would be filled?

Correct answer: E. 31/80

  • A. 2/11
  • B. 8/11
  • C. 3/22
  • D. 31/60
  • E. 31/80

Explanation

To solve the problem, first calculate the total amount of water in the three filled glasses: ¼, ½, and ⅘. Convert these fractions to a common denominator (20) to make calculation easier: ¼ = 5/20, ½ = 10/20, ⅘ = 16/20. Adding these gives you a total of 5/20 + 10/20 + 16/20 = 31/20. Since there are 4 glasses, divide the total water, 31/20, by 4 to find the amount of water per glass: (31/20) ÷ 4 = 31/80. Therefore, each glass would be filled to 31/80 of its capacity when the water is redistributed equally. Options A, B, C, and D do not match this calculation and are therefore incorrect.

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Quantitative reasoning applies arithmetic and basic algebra to numerical relationships, including percentages, ratios, averages, fractions, proportions, profit and loss, rates, time, work and measurement. Questions focus on translating words into equations, choosing an efficient method and checking whether the result is numerically reasonable.

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