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Simple Interest - General Aptitude

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.
Q1:

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

ANS:E - Both I and II are necessary to answer

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).