Latest Posts:

IBPS PO 2020 Prelims Free Mock Test

## What is Data Sufficiency?

Data Sufficiency is one of the important topics of the reasoning section of any banking exam. These type of questions aims to test the basic mathematical skills along with reasoning, analytical, and problem-solving abilities. Questions on data sufficiency require little to no calculation, which also means that you can solve this question quickly. However, you will still have to apply your mind before answering.

## Format of the Question

In this type of question, a question will be given along with two statements and you will have to figure out whether the question can be answered using the two, either in isolation or in combination. The questions can be categorised on relationships, dates, comparison, critical analysis, age or any other topics. However, irrespective of the category of the questions, they can be easily and quickly solved using the below-mentioned approach.

RBI Grade B 2020 Phase I Free Mock Test

Best Data Sufficiency Tips with Examples

## Methodology to Solve Data Sufficiency Questions

1. Read the question at least 2 to 3 times so that you not only understand the requirement of the question but also the kind of data you will require to solve it. If you can do this successfully, then half the battle is won here itself.
2. Once you have understood the question, you should then read only the first statement. You should check if the first statement alone is sufficient to answer the question or not.
3. Then you should read the second statement and check if the second statement alone can answer the question or not.
4. After reading both the statements, you will have a sense of understanding of whether both the statement alone can answer the question, or they would have to be used together to answer the question.
5. It is also possible that one of the statements can answer the question while the other will not, or both the statement together may not be able to answer the question. Hence, do not worry if that happens.

IBPS PO 2020 Prelims Free Mock Test

Direction Sense PDF- Concept, Tips & Questions for Practice

Let’s have a look at 2 examples of Data Sufficiency for a better understanding:

## Example 1:

The following question is followed by two statements named I and II. You have to decide if these statements are sufficient to answer the asked questions and mark the correct option.

Who among P, Q, R, S and T each one having different weight is the third heaviest?

I. Q is heavier than R and S. T is heavier only than P

II. Only three are lighter than R. The weight of Q is 50 kg which is 2 kg more than R. S is heavier only than P and T

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.

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.

C. If the data either in statement I alone or in statement II alone are sufficient to answer the question.

D. If the data even in both statements I and II together are not sufficient to answer the question.

E. If the data in both statements I and II together are necessary to answer the question.

IBPS PO 2020 Prelims Free Mock Test

Solution: The correct answer is Option B. As discussed above, the best way to solve the question is by first understanding the questions and then evaluation the statement one at a time. The question is asking who is the third heaviest among P, Q, R, S, T. To find this let us look at each of the statement given:

Statement I: Q, R/S, T, P (In this, we only know that Q is heavier than R and S, while T is heavier to P only. So possibly, P is the lightest. However, there is no certainty on whether R is the third heaviest or S. Hence, it is difficult to infer anything from this statement alone).

Statement II: Q (50 kg), R (48 kg), S, P/T (In this statement, the weights of Q and R are given, while also stating that three of them are lighter than R, with S being heavier than P and T. Hence, from this statement, we can infer that S is the third heaviest).

Hence, in this question, Statement II alone can help to solve the question, and therefore, Option B is the correct answer.

IBPS PO 2020 Prelims Free Mock Test

## Example 2:

The following question is followed by two statements named I and II. You have to decide if these statements are sufficient to answer the asked questions and mark the correct option.

On which day of the week did Anu arrive?

I. Her sister Tanu correctly remembers that she did not arrive on Wednesday.

II. Her mother correctly mentions that she arrived before Friday but after Tuesday.

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.

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.

C. If the data either in statement I alone or in statement II alone are sufficient to answer the question.

D. If the data even in both statements I and II together are not sufficient to answer the question.

E. If the data in both statements I and II together are necessary to answer the question.

IBPS PO 2020 Prelims Free Mock Test

Solution: The correct answer is Option E, as this in case both the statements are required to answer the question.

Statement I: Among the 7 days, Tanu mentioned that her sister did not arrive on a Wednesday, leaving us with the remaining 6 days and on either of the days Anu could have arrived. Hence, this statement is not sufficient to answer the question.

Statement II: Anuâ€™s mother gave more information on Anuâ€™s arrival by stating that she arrived before Friday and after Tuesday, which means that Anu would have arrived wither on a Wednesday or Thursday. However, we are still not sure about the day Anu arrived.

Combining both the statement: On using both the statement, we can certainly say that Anu arrived on a Thursday.

Hence, in this question, both Statement 1 and II are required to solve the question, and therefore, Option E is the correct answer.

IBPS PO 2020 Prelims Free Mock Test

1. Do not rush to answer the question with reading and understanding the questions and statements.
2. Donâ€™t get into doing any calculation as Data Sufficiency questions will not need any calculations.
3. Avoid making any assumptions under all circumstances.
4. Avoid selecting an answer after testing just one statement. It is important to check all the statements and then decide upon the correct option.
5. As already mentioned, these types of questions can be solved quickly and so do not spend much time on it. In case you feel you will take more time than simply skip the question and come back to it later when you have time.
6. Practise at least 100 questions on this topic. Remember, the more variety of data sufficiency questions you solve the better your preparation will be. We at PracticeMock, provide a variety of Data Sufficiency questions which you can practice for free.

IBPS PO 2020 Prelims Free Mock Test