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SBI Clerk Mains Reasoning (Day-87)

Reasoning Material for SBI Clerk Mains 2020

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Linear row seating arrangement

Directions (1-5): Study the following information carefully and answer the questions.

Eight persons P, A, Q, B, R, C, S and D are sitting in a row but not necessarily in the same order. Some of them are facing north and some of them are facing south.  D is 40 years old and the persons who are sitting to the left of D are younger to D and the personswho are sitting to the right of D are elder to D. It is also known that

Note: Facing the same direction means, if one is facing north then the other also faces north and vice-versa. Facing the opposite directions means, if one is facing north then the other faces south and vice-versa.

A and S are facing the opposite direction. Two persons are sitting between P and D. The one who is 10 years elder than P sits second to the right of P who sits at one of the ends. Three persons sit between C and B.D faces north. The one who is 54 years old sits second to the left of B. S and C facing the opposite direction. Number of persons sits between B and Q is as same as that of D and R. R faces same direction as the second eldest person. C’s age is five more than the half of D’s age. None of the persons are below 18 years old. The one who is 60 years old sits third to the left of Q. The Sum of ages of Q and R is equal to thrice the age of C and the difference between the ages of R and Q is 15 years. The eldest person is two years elder than the second eldest person. C faces same direction as the eldest person. Not more than two people facing same direction are sitting together.

1) Who is the eldest person in the group?

A) S

B) A

C) B

D) P

E) Q

2) Which of following person sits third to the left of C?

A) The one who is 40 years old

B) The one who is 60 years old

C) The one who is immediate right of B

D) A

E) None of these

3) What is the sum of ages of third youngest and fourth eldest person in the group?

A) 70 Years

B) 85 Years

C) 60 Years

D) 75 Years

E) None of these

4) Who sits immediate right of R?

A) P

B) The one who is second to the right of B

C) A

D) The one whose age is 60

E) Both (C) and (D)

5) Which of the following statement(s) is/are correct?

i) D and R are facing the same direction

ii) S is younger than A

iii) Q is 60 years old

A) Only (i) and (iii)

B) Only (i) and (ii)

C) Only (ii)

D) Only (i)

E) All (i), (ii) and (iii)

Data sufficiency

Directions (6-8): 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:

a) 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.

b) 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.

c) If the data either in Statement I alone or in Statement II alone aresufficient to answer the question.

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

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

6) Eight boxes namely -P, Q, R, S, T, U, V and W are kept one above another but not necessarily in the same order. Box R is kept third from bottom at a gap of two from box S, which is kept adjacent to box Q and box P is kept at a gap of one from box Q. Which box is kept immediate above box T?

I) Box V is kept at a gap of two from box P and Box W is neither kept at the bottom nor adjacent tobox R. Box V is kept at a gap of two from box U.

II) Box U is kept at a gap of two from box V, which is kept adjacent to box R. Box W is kept adjacent to box P.

A) a

B) b

C) c

D) d

E) e

7) Six persons namely – Raj, Gaurav, Payal, Dev, Riya and Hari are sitting in a circular table facing center but not necessarily inthesame order. Each person likes different pet – Parrot, Horse, Monkey, Cat, Rat and Dog but not necessarily in the same order. Who sits immediate right of the one who likes Rat?

I) Riya sits second to the left of Dev, who sits third to the right of Gaurav. One who likes Dog sits immediate neighbor of Gaurav and sits second to the right of the one who likes Parrot. One who likes Dog sits immediate right of Raj who likes Cat. Hari sits second to the left of the one who likes Monkey, who sits immediate neighbor of Payal.

II) Dev likes Parrot sits second to the left of Hari, who sits second to left of Riya. Payal sits second to the left of Raj, who sits immediate left of the one who likes Dog and Raj likes Cat. The One who likes Horse sits immediate neighbor of Hari. Riya likes monkey.

A) a

B) b

C) c

D) d

E) e

8) Seven persons namely – Riya, Hema, Golu, Zoya, Hari, Ravi and Jiya are sitting in a row but not necessarily in the same order in such a way that some are facing north while others are facing south. Hari faces north. Riya sits third to the left of Hari, either of them sits at end of the row and Ravi sits immediate left of Riya. Ravi sits second to the left of Zoya, who is facing south. How many persons sit facing south?

I) Person sitting immediate neighbor of Zoya sits fourth to the right of Jiya. Person sitting at the end of the row sits facing in opposite direction and Golu sits third from the right end.

II) Person sitting immediate left of Ravi sits fourth to the right of Jiya and Golu sits second to the left of Hari.

A) a

B) b

C) c

D) d

E) e

Direction sense

Directions (9-10): Study the following information carefully and answer the questions given below:

If,

‘Q#^S’ means Point Q is 8m north of Point S.

‘Q$%S’ means Point Q is 10m east of Point S.

‘Q^&S’ means Point Q is 4m west of Point S.

[email protected]*S’ means Point Q is 5m south of Point S.

9) If D#^C$%[email protected]*R, then how far and in which direction is Point R with respect to Point T, if Point T is 3m south of Point D?

A) 5m, West

B) 3m, West

C) 8m, West

D) 10m, West

E) None of these

10) If K^&M$%[email protected]*H, P$%H, then how far and in which direction is Point P with respect to Point M?

A) 5m, South

B) 5m, North

C) 7m, North

D) 7m, South

E) None of these

Answers:

Directions (1-5):

NOTE:  D is 40 years old and the persons who are sitting to the left of D are younger to D and the persons who are sitting to the right of D are elder to D.

  • D faces north.
  • C’s age is five more than the half of D’s age. So C’s age is 25 years.
  • Two persons are sitting between P and D.
  • The one who is 10 years elder than P sits second to the right of P who sits at one of the ends.
  • None of the persons are below 18 years old.
  • Three persons sit between C and B.
  • The one who is 54 years old sits second to the left of B.

From the above statement, we have two possible cases

  • Number of persons sits between B and Q is as same as that of D and R.
  • The one who is 60 years old sits third to the left of Q.

Now the possible cases are,

  • The Sum of ages of Q and R is equal to thrice the age of C and the difference between the ages of Q and R is 15 years. This statement is not satisfied by case 2A because we get the age Q as 45yearsor 75 years. So this case is eliminated.

By solving Q+R=75; R-Q=15, we get Q/R=30 years and Q/R=45 years. We can also know the person second to the right of P is 10 years elder than P. Now P’s age is 20 years.

But in case 2B, R sits left of D it doesn’t satisfied the given condition(D is 40 years old and the persons who are sitting to the left of D are younger to D and the persons who are sitting to the right of D is elder to D). So this case is eliminated.

Now Case 1 becomes

  • The eldest person is two years elder than the second eldest person. For this statement, B is either eldest or second eldest person in the group. If B is the eldest person then the age of second eldest person is 58 years. If B is second eldest then the age of eldest person is 62 years.
  • C faces same direction as the eldest person.
  • S and C facing the opposite direction.
  • A and S are facing the opposite direction.
  • R faces same direction as the second eldest person.

  • Not more than two people facing same direction are sitting together. For this statement expect case 1A all the cases are eliminated. Now the final arrangement becomes

1) Answer: C

2) Answer: C

3) Answer: D

4) Answer: C

5) Answer: D

6) Answer: C

We have:

  • Box R is kept third from bottom at a gap of two from box S, which is kept adjacent to box Q that means box S is kept third from thetop and we have two different cases for box Q, in case (1) box Q is kept immediate above box S and in case (2) box Q is kept immediate below box S.
  • Box P is kept at a gap of one from box Q, which means in case (1) P is kept immediately below S and in case (2) box P is kept immediately above box S.

Based on the above given information we get:

From I:

We have:

  • Box W is neither kept at the bottom nor adjacent toboxR, which means box W is kept at top. Box V is kept at a gap of two from box P, which means in case (1) BoxV is kept immediate below box R and in case (2) box V is kept immediate above box R.
  • Box V is kept at a gap of two from box U, which means case (1) is not valid and in case (2) box U is kept at the bottom.

Based on the above given information, we get final arrangement as follow:

Thus, box R is kept immediately above box T.

Hence, statement I alone is sufficient.

From II:

We have:

  • Box W is kept adjacent tobox P, which means in case (1) box W is kept immediately below box P and in case (2) the box W is kept immediately above box P.
  • Box U is kept at a gap of two from box V, which is keptadjacent tobox R, that means case (1) is not valid and in case (2) box V is kept immediate above box R.

Based on theabove given information, we get final arrangement as follow:

Thus, box R is kept immediately above box T.

Hence, statement II alone is sufficient.

7) Answer: B

From I:

We have:

  • Riya sits second to the left of Dev, who sits third to the right of Gaurav and the One who likes Dog sits immediate neighbor of Gaurav.
  • One who likes Dog sits immediate right of Raj who likes Cat, that means one who likes Dog sits left of Gaurav. One who likes Dog sits second to the right of the one who likes Parrot, that means Dev likes Parrot.
  • Hari sits second to the left of the one who likes Monkey, who sits immediate neighbor of Payal, that means Hari likes Dog.

Based on the above given information we get:

Since, we don’t know who likes Rat, thus result can’t be determined.

Hence, statement I is not sufficient.

From II:

We have:

  • Dev likes Parrot sits second to the left of Hari, who sits second to left of Riya. Payal sits second to the left of Raj, who sits immediate left of the one who likes Dog and Raj likes Cat.
  • One who likes Monkey sits second to the right of the one who likes Dog, which means Riya likes Monkey. One who likes Horse sit immediate neighbor of Hari, that means Gaurav likes Horse. Riya likes monkey.

Based on the above given information we get:

Thus, Dev sits immediate right of one who likes Rat.

Hence, statement II is alone sufficient.

8) Answer: D

We have:

  • Hari faces north
  • Riya sits third to the left of Hari, either of them sits at end of the row, which means we get two possibilities, in case (1) Hari sits facing north at right end and in case (2) Riya sits at extreme left end.
  • Ravi sits immediate left of Riya and Ravi sits second to left of Zoya, who sits facing south, that means case (2) is not valid, in case (1a) Riya sits facing south and in case (1b) Riya sits facing north.

Based on the above given information we get:

From I:

We have:

  • Person sitting immediate neighbor of Zoya sits fourth to the right of Jiya, which means Jiya must sit facing south.
  • Person sitting at the end of the row sits facing in opposite direction. Golu sits third from the right end, which means case (1a) is not valid.

Based on the above given information, we havethe following result:

Case1a Golu sits third from the right endthis condition is not satisfied so rejected.

Since, direction facing of Hema and Ravi is not known, thus we can’t determine the required result.

Hence, statement I is not sufficient.

From II:

We have:

  • Person sitting immediate left of Ravi sits fourth to theright of Jiya, which means in case (1a) Ravi sits facing south and in case (1b) Ravi sits facing north.
  • Golu sits second tothe left of Hari, which means case (1a) is not valid.

Based on the above given information, we getthe following result:

Since, direction of Hema and Golu is not known, thus result can’t be determined.

Hence, statement II is not sufficient.

From I and II:

Based on the above given statements we get:

Since, direction of Hema is not known, thus result can’t be determined.

Hence, statement I and II together are not sufficient.

9) Answer: D

10) Answer: B

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