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RRB Group D Ages — practice questions

Explore 20 free Ages questions in RRB Group D Quantitative Aptitude. Open each question or exercise to read its content, reference answers and available explanation.

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Ages questions and exercises with answers

Showing questions 1–20 of 20.

The age of a mother 10 years ago was thrice her son's age. 10 years hence, her age will be twice her son's. The ratio of their present ages is:Read the answer and worked solution →Complete the idea of a percentageRead the answer and worked solution →Ratios into percentagesRead the answer and worked solution →Order the steps of the unitary methodRead the answer and worked solution →What is the percentage taken OF?Read the answer and worked solution →True or false: percentages and their baseRead the answer and worked solution →Match each comparison to its formRead the answer and worked solution →Common percentage conversionsRead the answer and worked solution →Assertion and reasonRead the answer and worked solution →Two are true, one is notRead the answer and worked solution →Three of these are wrong. Find the one that holds.Read the answer and worked solution →Tap every correct way to express one quarterRead the answer and worked solution →Flip and pair: fraction with percentageRead the answer and worked solution →Spot the one that does not belongRead the answer and worked solution →True or false: the unitary methodRead the answer and worked solution →Ratio, fraction, or percentage?Read the answer and worked solution →Complete the comparison chainRead the answer and worked solution →Percentage of a quantityRead the answer and worked solution →Order the steps: turn a part into a percentageRead the answer and worked solution →Assertion and reason: comparisonsRead the answer and worked solution →

Worked practice questions

The age of a mother 10 years ago was thrice her son's age. 10 years hence, her age will be twice her son's. The ratio of their present ages is:

  1. 12 : 5
  2. 6 : 1
  3. 7 : 3
  4. 5 : 2
Show answer and solution

Correct answer: C. 7 : 3

1. Let present ages be M and S. Then M - 10 = 3(S - 10), so M = 3S - 20. 2. Also M + 10 = 2(S + 10), so M = 2S + 10. 3. 3S - 20 = 2S + 10 gives S = 30, M = 70. Ratio = 70 : 30 = 7 : 3. _Source: RRB Group D CEN-02/2018 PYQ, Q.46._

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Complete the idea of a percentage

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Missing parts
  1. Answer
    100
    Choices
    1. 100
    2. 10
    3. 1
  2. Answer
    20%
    Choices
    1. 20%
    2. 5%
    3. 25%
Complete the statement
A ratio compares two quantities. A percentage expresses that comparison out of {0}, which is why 5 oranges among 25 fruits is {1}.
A percentage is a comparison expressed out of 100. Source: syllabus Maths, Ch 7 Comparing Quantities.

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Ratios into percentages

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Questions
  1. Question
    5 oranges among 25 fruits is what percentage?
    Choices
    1. 5%
    2. 20%
    3. 25%
    Correct choice
    20%
  2. Question
    The ratio of 5 oranges to 20 apples simplifies to
    Choices
    1. 4 : 1
    2. 5 : 25
    3. 1 : 4
    Correct choice
    1 : 4
  3. Question
    So the apples number how many times the oranges?
    Choices
    1. 4 times
    2. 5 times
    3. one quarter
    Correct choice
    4 times
  4. Question
    20 apples among 25 fruits is
    Choices
    1. 20%
    2. 80%
    3. 25%
    Correct choice
    80%
The chapter's own basket: 20 apples and 5 oranges so 5 of the 25 fruits are oranges, which is 20%. Source: syllabus Maths, Ch 7 Comparing Quantities.

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