DATA SUFFICIENCY PART 1

Data Sufficiency

Data sufficiency covers many different topics of quantitative aptitude. In data sufficiency, usually, a question is followed by two or three statements. You need to determine whether any of the statements individually or together are required to find the answer. You are not required to do the calculation, you just have to check whether with the help of given data you can find the answer or not. Data sufficiency has many types of questions. And today we will be discussing on CI and SI-based data sufficiency.

In compound interest and simple interest you just have to calculate the rate of interest based on the number of years given to you. The rate of interest and the total amount has to be calculated on the based of the formulas.

The formula to calculate simple interest

I = P x R x N/100, where p is the principal amount, r is the rate of interest, and n is the number of years

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The formula to calculate compound interest

A = P (1 + R/100)n

Here, A is the total amount i.e. principal + interest, P is the principal amount, R is the rate of interest, and N is the number of years. There are other two formulas as well to calculate compound interest quarterly and half-yearly.

Compound interest for quarterly, A = P(1 + R/100 x 2)²n

Compound interest for half-yearly, A = P(1 + R/100 x 4)4n

Before solving the questions, here are the directions for the questions:

Each question given will be followed by two statements.

  • If statement I alone is sufficient, but statement II alone is not sufficient mark(A)
  • Statement II alone is sufficient, but the statement I alone is not sufficient mark (B).
  • If both the statements I and II together are sufficient, but neither statements alone is sufficient mark (C).
  • Each statement alone is sufficient mark (D).
  • If statement I and II together are not sufficient mark (E).

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