Aptitude - Simple Interest - Discussion

Each of the questions given below consists of a statement and / or a question and two statements numbered I and II given below it. You have to decide whether the data provided in the statement(s) is / are sufficient to answer the given question. Read the both statements and

  • Give answer (A) if the data in Statement I alone are sufficient to answer the question, while the data in Statement II alone are not sufficient to answer the question.
  • Give answer (B) if the data in Statement II alone are sufficient to answer the question, while the data in Statement I alone are not sufficient to answer the question.
  • Give answer (C) if the data either in Statement I or in Statement II alone are sufficient to answer the question.
  • Give answer (D) if the data even in both Statements I and II together are not sufficient to answer the question.
  • Give answer(E) if the data in both Statements I and II together are necessary to answer the question.

1. 

The simple interest on a sum of money is Rs. 50. What is the sum?

I. 

The interest rate is 10% p.a.

 II. 

The sum earned simple interest in 10 years.

[A]. I alone sufficient while II alone not sufficient to answer
[B]. II alone sufficient while I alone not sufficient to answer
[C]. Either I or II alone sufficient to answer
[D]. Both I and II are not sufficient to answer
[E]. Both I and II are necessary to answer

Answer: Option E

Explanation:

Given : S.I. = Rs. 50.

I gives, R = 10% p.a.

II gives, T = 10 years.

Sum = 100 x S.I. = Rs. 100 x 50 = Rs. 50.
T x R 10 x 10

Thus, I and II together give the answer.

Correct answer is (E).


Blacky said: (Jun 28, 2011)  
I think option A will be enough to find the sum

SI=(P*T*R/100)
50=(P*T*R/100)
P=x; t=1; r=10 (10 % 'per' annum i.e. r=10 for 1 year)

50=(x*1*10/100)
x=50 ie Principal=50

Subha Das said: (Aug 18, 2015)  
Very good. I think it help us so much.

Pratik said: (Dec 28, 2017)  
Very good explanation, Thanks @Blacky.

Sanu said: (Jan 16, 2018)  
Good explanation @Blacky.

Apuroop said: (Jan 4, 2019)  
@Blacky.

The principal will be 500.

Gupta said: (Jan 27, 2019)  
Yes, right @Apuroop.

The Principal will be 500rs.

Harshitha said: (Jul 15, 2019)  
Thanks for explaining it @Blacky.

Post your comments here:

Name *:

Email   : (optional)

» Your comments will be displayed only after manual approval.