Easy and best way to understand data sufficiency with examples

This section will help you to learn about the Verbal reasoning aptitude called ‘Data Sufficiency.’ In the view of competitive exams, Data Sufficiency is an important part of verbal reasoning.

Verbal reasoning based Data Sufficiency questions and answers are all frequently asked in competitive exams, entrance exams, bank exams, interviews, or any other exams.

Data Sufficiency based questions and answers are very easy to do and hence it helps in scoring good marks.

While writing any kind of competitive exams, if you are curious about solving all the given questions, then time management is very important. So practice time management to answer questions properly.

What is called Data Sufficiency?

In verbal reasoning, each data sufficiency question comes with an item in which the candidates need not to actually find the answer.

Instead they have to decide whether the information presented along with the question will be enough (sufficient) or not to allow them to answer the question.

Data sufficiency questions are a challenge for your reasoning and problem solving abilities. Though it can be solved easily with basic math facts and analytical skills.

A question will be given with multiple choices stating the relationship between the question and the information provided will be in a different way.

It may be tricky but candidates must select the answer from the choices that describe the relationship accurately.

Data sufficiency – Tips and tricks

  1. For any kind of analysing based questions, examining the given question is most important and so data sufficiency is not exceptional from it.
  2. Understand and observe both the given statements individually along with the question.
  3. Try to figure out the relationships and difference between the given statements.
  4. Use elimination trick, that is eliminating the wrong statements first.
  5. Understand the options that are given along with the questions. Because it is a difficult task in data sufficiency.


Question: How many children does John have?


  1. Mary is the only daughter of Regina, who is the wife of John
  2. Roselin and Maria are sisters of John


  1. Statement I alone is sufficient but statement II alone is not sufficient to answer the question asked.
  2. Statement II alone is sufficient but statement I is not sufficient to answer the question asked.
  3. Both statements I and II together are sufficient to answer the question but neither statement is sufficient alone.
  4. Each statement alone is sufficient to answer the question.
  5. Statements I and II are not sufficient to answer the question asked and additional data is needed to answer the statements.

Answer is option (e). Because the statements provided states that John has a daughter and two sisters. John may or may not have a son. So both the statements are not sufficient and we need additional data to answer the question.

Practicing will help you in scoring high marks in verbal reasoning. Do practice daily and attend more online tests to be an expert in answering skilled questions.