Data Sufficiency Model Questions Set 1 Section-Wise Topic Notes With Detailed Explanation And Example Questions

MOST IMPORTANT quantitative aptitude - 1 EXERCISES

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The following question based on Data Sufficiency topic of quantitative aptitude

Questions :

Directions:

Each of the questions below consists of a question and two statements numbered I and II given below it. You have to decide whether the data provided in the statements are sufficient to answer the question. Read both the statements and:
  1. If the data in Statement I alone is sufficient to answer the question, while the data in Statement II alone is not sufficient to answer the question.
  2. If the data in Statement II alone is sufficient to answer the question, while the data in Statement I alone is not sufficient to answer the question.
  3. If the data in Statement I alone or in Statement II alone is sufficient to answer the question.
  4. If the data in both the Statements I and II are not sufficient to answer the question.
  5. If the data in both the Statements I and II together are necessary to answer the question.
How is 'cricket' written in the code language?
Statements :
I. 'Dinesh, play cricket' is written as 'do, si ha'.
II. 'play cricket now' is written as 'ha si ma''.

(a) If the data in both the Statements I and II are not sufficient to answer the question.

(b) If the data in Statement I alone is sufficient to answer the question, while the data in Statement II alone is not sufficient to answer the question.

(c) If the data in Statement I alone or in Statement II alone is sufficient to answer the question.

(d) If the data in Statement II alone is sufficient to answer the question, while the data in Statement I alone is not sufficient to answer the question.

The correct answers to the above question in:

Answer: (a)

From statement I + II

Dinesh play cricket→ dosi ha

play cricket now →ha si ma

Hence the code for 'cricket' is either 'ha' or 'si'.

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Read more model question set 1 Based Quantitative Aptitude Questions and Answers

Question : 1

Directions:

Each of the questions below consists of a question and two statements numbered I and II given below it. You have to decide whether the data provided in the statements are sufficient to answer the question. Read both the statements and:
  1. If the data in Statement I alone is sufficient to answer the question, while the data in Statement II alone is not sufficient to answer the question.
  2. If the data in Statement II alone is sufficient to answer the question, while the data in Statement I alone is not sufficient to answer the question.
  3. If the data in Statement I alone or in Statement II alone is sufficient to answer the question.
  4. If the data in both the Statements I and II are not sufficient to answer the question.
  5. If the data in both the Statements I and II together are necessary to answer the question.
How is Gita related to Ganesh ?
Statements :
I. Gita's brother is Ganesh's father's eldest son.
II. Ganesh's wife's mother-in-law is Gita's mother.

a) If the data in both the Statements I and II are not sufficient to answer the question.

b) If the data in Statement I alone is sufficient to answer the question, while the data in Statement II alone is not sufficient to answer the question.

c) If the data in Statement I alone or in Statement II alone is sufficient to answer the question.

d) If the data in Statement II alone is sufficient to answer the question, while the data in Statement I alone is not sufficient to answer the question.

Answer: (a)

There is no information about Geeta's gender so relationship between Geeta & Ganesh cannot be determined.

Question : 2

Directions:

Each question below is followed by two statements I and II. You are to determine whether the data given in the statements is sufficient for answering the question. You should use the data and your knowledge of Mathematics to choose between the possible answers.
  1. (a) if the statement I alone is sufficient to answer the question, but the statement II alone is not sufficient.
  2. (b) if the statement II alone is sufficient to answer the question, but the statement I alone is not sufficient.
  3. (c) if both statements I and II together are needed to answer the question.
  4. (d) if either the statement I alone or statement II alone is sufficient to answer the question.
  5. (e) if you cannot get the answer from the statement I and II together, but need even more data
How many daughters does P have?
I. K and M are sisters of T.
II.T's father is husband of P's mother.

a) if either the statement I alone or the statement II alone is sufficient to answer the question.

b) if the statement I alone is sufficient to answer the question, but the statement II alone is not sufficient.

c) if both statements I and II together are needed to answer the question.

d) if the statement II alone is sufficient to answer the question, but the statement I alone is not sufficient.

e) if you cannot get the answer from the statements I and II together, but need even more data.

Answer: (a)

From both the statements K, M and T are siblings of P

Question : 3

Directions:

Each of the questions below consists of a question and two statements numbered I and II given below it. You have to decide whether the data provided in the statements are sufficient to answer the question. Read both the statements and:
  1. If the data in Statement I alone is sufficient to answer the question, while the data in Statement II alone is not sufficient to answer the question.
  2. If the data in Statement II alone is sufficient to answer the question, while the data in Statement I alone is not sufficient to answer the question.
  3. If the data in Statement I alone or in Statement II alone is sufficient to answer the question.
  4. If the data in both the Statements I and II are not sufficient to answer the question.
  5. If the data in both the Statements I and II together are necessary to answer the question.
Which direction is Shilpa facing ?
Statements :
I. If Meeta who is currently facing South, and turns 90° towards her left, she would face the same direction as Shilpa.
II. If Uday who is currently facing North, turns 90° towards his left, he would face a direction just opposite to the direction Shilpa is facing.

a) If the data in both the Statements I and II are not sufficient to answer the question.

b) If the data in Statement I alone is sufficient to answer the question, while the data in Statement II alone is not sufficient to answer the question.

c) If the data in Statement I alone or in Statement II alone is sufficient to answer the question.

d) If the data in Statement II alone is sufficient to answer the question, while the data in Statement I alone is not sufficient to answer the question.

Answer: (c)

From statement I ⇒Shilpa is facing East.

From statement II ⇒ Shilpa is facing East.

Question : 4

Directions:

Each question below is followed by two statements I and II. You are to determine whether the data given in the statements is sufficient for answering the question. You should use the data and your knowledge of Mathematics to choose between the possible answers.
  1. (a) if the statement I alone is sufficient to answer the question, but the statement II alone is not sufficient.
  2. (b) if the statement II alone is sufficient to answer the question, but the statement I alone is not sufficient.
  3. (c) if both statements I and II together are needed to answer the question.
  4. (d) if either the statement I alone or statement II alone is sufficient to answer the question.
  5. (e) if you cannot get the answer from the statement I and II together, but need even more data
What is the number of teachers in the school?
Statements :
I. Each teacher takes at least three lectures in a day.
II. There are 45 lectures in a week.

a) if either the statement I alone or statement II alone is sufficient to answer the question.

b) if the statement I alone is sufficient to answer the question, but the statement II alone is not sufficient.

c) if both statements I and II together are needed to answer the question.

d) if the statement II alone is sufficient to answer the question, but the statement I alone is not sufficient.

Answer: (e)

The question cannot be answered even after using information of both statements together.

Question : 5

Directions:

Each question below is followed by two statements I and II. You are to determine whether the data given in the statements is sufficient for answering the question. You should use the data and your knowledge of Mathematics to choose between the possible answers.
  1. (a) if the statement I alone is sufficient to answer the question, but the statement II alone is not sufficient.
  2. (b) if the statement II alone is sufficient to answer the question, but the statement I alone is not sufficient.
  3. (c) if both statements I and II together are needed to answer the question.
  4. (d) if either the statement I alone or statement II alone is sufficient to answer the question.
  5. (e) if you cannot get the answer from the statement I and II together, but need even more data
What is the age of C, in a group of A, B, C, D and E, whose average age is 45 years?
I. Average of the ages of A and B is 53 years.
II.Average of the ages of D and E is 47 years

a) if either the statement I alone or the statement II alone is sufficient to answer the question.

b) if the statement I alone is sufficient to answer the question, but the statement II alone is not sufficient.

c) if both statements I and II together are needed to answer the question.

d) if the statement II alone is sufficient to answer the question, but the statement I alone is not sufficient.

e) if you cannot get the answer from the statements I and II together, but need even more data.

Answer: (c)

Age of C = Total age – age of (A + B + D + E)

= Total age – 2 × Average ages of (A + B) – 2 × Average ages of (D + E)

Question : 6

Directions:

Each of the questions below consists of a question and two statements numbered I and II given below it. You have to decide whether the data provided in the statements are sufficient to answer the question. Read both the statements and:
  1. If the data in Statement I alone is sufficient to answer the question, while the data in Statement II alone is not sufficient to answer the question.
  2. If the data in Statement II alone is sufficient to answer the question, while the data in Statement I alone is not sufficient to answer the question.
  3. If the data in Statement I alone or in Statement II alone is sufficient to answer the question.
  4. If the data in both the Statements I and II are not sufficient to answer the question.
  5. If the data in both the Statements I and II together are necessary to answer the question.
What is the father's present age?
Statements :
I. Father's present age is five times the son's present age.
II. Five years ago the father's age was fifteen times the son's age at that time.

a) If the data in both the Statements I and II are not sufficient to answer the question.

b) If the data in Statement I alone is sufficient to answer the question, while the data in Statement II alone is not sufficient to answer the question.

c) If the data in Statement I alone or in Statement II alone is sufficient to answer the question.

d) If the data in Statement II alone is sufficient to answer the question, while the data in Statement I alone is not sufficient to answer the question.

Answer: (e)

Let the present age of father and son be x and y years respectively.

From statement I,

x = 5 × y ...(i)

From statement II,

x – 5 = 15 × (y – 5) ...(ii)

Solving for x and y we get x = 35. So both statements together are necessary to give the answer.

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