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RRB Group D Simple & Compound Interest — practice questions

Explore 21 free Simple & Compound Interest 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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Simple & Compound Interest questions and exercises with answers

Showing questions 1–21 of 21.

A sum of ₹6000 is invested at 20% per annum. If interest is compounded half-yearly, the amount received after 18 months will be:Read the answer and worked solution →The compound interest on Rupees 1,60,000 for 2 years at 10% per annum, compounded semi-annually, 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

A sum of ₹6000 is invested at 20% per annum. If interest is compounded half-yearly, the amount received after 18 months will be:

  1. ₹7,896
  2. ₹7,986
  3. ₹7,800
  4. ₹7,928
Show answer and solution

Correct answer: B. ₹7,986

1. Half-yearly rate = 20%/2 = 10%; number of half-years in 18 months = 3. 2. Amount = 6000 × (1 + 10/100)³ = 6000 × (1.1)³. 3. = 6000 × 1.331 = ₹7,986. _Source: RRB Group D CEN-02/2018 PYQ, Q.24._

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The compound interest on Rupees 1,60,000 for 2 years at 10% per annum, compounded semi-annually, is:

  1. Rupees 34,400
  2. Rupees 30,000
  3. Rupees 34,480
  4. Rupees 34,481
Show answer and solution

Correct answer: D. Rupees 34,481

1. Semi-annual rate = 5%, number of periods = 4. 2. Amount = 160000 x (1.05)^4 = 160000 x 1.21550625 = 194481. 3. CI = 194481 - 160000 = 34481. _Source: RRB Group D CEN-02/2018 PYQ, Q.47._

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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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More Quantitative Aptitude topics

Simple InterestNumber SystemRatio and ProportionTime and WorkProfit and LossSquare RootsProfit LossBasic Arithmetic