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Home Aptitude Compound Interest See What Others Are Saying!
  • Question
  • The least number of complete years in which a sum of money put out at 20% C.I. will be more than doubled is ?


  • Options
  • A. 3 years
  • B. 4 years
  • C. 2.5 years
  • D. 2 years

  • Correct Answer
  • 4 years 

    Explanation

    P 1 + 20 100 n  > 2P 

     

     

     

    Now, (6/5 x 6/5 x 6/5 x 6/5) > 2.

     

     

     

    So, n = 4 years.

  • Tags: GRE, GATE, CAT, Bank Exams, AIEEE, Bank PO, Bank Clerk

    More questions

    • 1. A certain sum of money becomes double of itself in 15 years at a rate of simple interest. In how many years will it become 5 times of itself at the same rate of simple interest

    • Options
    • A. 45
    • B. 37.5
    • C. 75
    • D. 60
    • Discuss
    • 2. A certain sum of money triples itself in 5 years at simple interest. In how many years it will be five times?

    • Options
    • A. 5
    • B. 8
    • C. 10
    • D. 15
    • Discuss
    • 3. Which of the following statement(s) is/are TRUE? I. 12>163>244II. 253>324>486III. 94>153>246

    • Options
    • A. Only I and II
    • B. Only I and III
    • C. Only I
    • D. All are true.
    • Discuss
    • 4. The simple interest on Rs. 2000 for 2 years at Rs. 75 per thousand per annum will be

    • Options
    • A. Rs.150
    • B. Rs.300
    • C. Rs.600
    • D. Rs.400
    • Discuss
    • 5. If x + y + z = 22 and xy + yz + zx = 35, then what is the value of (x ? y)2 + (y ? z)2 + (z ? x)2 ?

    • Options
    • A. 793
    • B. 681
    • C. 758
    • D. 715
    • Discuss
    • 6. A sum of Rs. 10,000 is lent partly at 6% and the remaining at 10% p.a. If the yearly interest on the average is 9.2%, the money lent at 10% is:-

    • Options
    • A. Rs. 8000
    • B. Rs. 8500
    • C. Rs. 5000
    • D. Rs. 2000
    • Discuss
    • 7. If (x + y)/z = 2, then what is the value of [y/(y ? z)] + [x/(x ? z)]?

    • Options
    • A. 0
    • B. 1
    • C. 2
    • D. ? 1
    • Discuss
    • 8. A sum becomes Rs 1392 in 2 years and Rs 1488 in 3 years at simple interest. What is the rate (in percentage) of interest per annum?

    • Options
    • A. 8
    • B. 10
    • C. 12
    • D. 8.5
    • Discuss
    • 9. If ? and ? are the roots of equation x2 ? 2x + 4 = 0, then what is the equation whose roots are ?3/?2 and ?3/?2?

    • Options
    • A. x2 ? 4 x + 8 = 0
    • B. x2 ? 32 x + 4 = 0
    • C. x2 ? 2 x + 4 = 0
    • D. x2 ? 16 x + 4 = 0
    • Discuss
    • 10. On a certain Principal if the Simple interest for two years is Rs 4800 and Compound interest for the two years is Rs 5088, what is the rate of Interest?

    • Options
    • A. 6 percent
    • B. 24 percent
    • C. 12 percent
    • D. 18 percent
    • Discuss


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