Reasoning PYQs

Eight persons O, X, Y, P, W, Z, V and U are sitting in a line.

Some of them are facing north and some of them are facing south.

1. O is second from one end and faces south.

2. X is sitting third to the left from O.

Thus, O is 2^nd from left end.

3. Neighbors of X are facing south.

4. P do not sit at any of the extreme ends.

5. Immediate neighbors of P face north.

Thus, there are two cases formed.

Case I:

Case II:

6. U is third to the left of W.

Thus, Case I is eliminated as there is no space where U and W can be placed.

In case II two probable cases can be formed.

Case II (a):

Case II (b): 

7. V sits immediate left of Z.

8. Immediate neighbours of Y faces south.

Thus, case II (a) gets eliminated as there is no place for V and Z.

Case II (b):

Thus, Y is an immediate neighbour of O and U.

Eight persons O, X, Y, P, W, Z, V and U are sitting in a line.

Some of them are facing north and some of them are facing south.

1. O is second from one end and faces south.

2. X is sitting third to the left from O.

Thus, O is 2^nd from left end.

3. Neighbors of X are facing south.

4. P do not sit at any of the extreme ends.

5. Immediate neighbors of P face north.

Thus, there are two cases formed.

Case I:

Case II:

6. U is third to the left of W.

Thus, Case I is eliminated as there is no space where U and W can be placed.

In case II two probable cases can be formed.

Case II (a):

Case II (b): 

7. V sits immediate left of Z.

8. Immediate neighbors of Y faces south.

Thus, case II (a) gets eliminated as there is no place for V and Z.

Case II (b):

Thus, O sits between W and Y.

Eight persons O, X, Y, P, W, Z, V and U are sitting in a line.

Some of them are facing north and some of them are facing south.

1. O is second from one end and faces south.

2. X is sitting third to the left from O.

Thus, O is 2^nd from left end.

3. Neighbors of X are facing south.

4. P do not sit at any of the extreme ends.

5. Immediate neighbors of P face north.

Thus, there are two cases formed.

Case I:

Case II:

6. U is third to the left of W.

Thus, Case I is eliminated as there is no space where U and W can be placed.

In case II two probable cases can be formed.

Case II (a):

Case II (b): 

7. V sits immediate left of Z.

8. Immediate neighbors of Y faces south.

Thus, case II (a) gets eliminated as there is no place for V and Z.

Case II (b):

Thus, position of V with respect to Y cannot be determined as the direction of Y is not specified.

Eight persons O, X, Y, P, W, Z, V and U are sitting in a line.

Some of them are facing north and some of them are facing south.

1. O is second from one end and faces south.

2. X is sitting third to the left from O.

Thus, O is 2^nd from left end.

3. Neighbors of X are facing south.

4. P do not sit at any of the extreme ends.

5. Immediate neighbors of P face north.

Thus, there are two cases formed.

Case I:

Case II:

6. U is third to the left of W.

Thus, Case I is eliminated as there is no space where U and W can be placed.

In case II two probable cases can be formed.

Case II (a):

Case II (b): 

7. V sits immediate left of Z.

8. Immediate neighbors of Y faces south.

Thus, case II (a) gets eliminated as there is no place for V and Z.

Case II (b):

Thus, there are 3 persons between Y and V.

Persons – 10; L, M, N, O, P, S, T, U, W and Z;

Row 1, South – L, M, N, O, and P; Row 2, North – S, T, U, W and Z;

1. Number of persons to the right of S is two less than the number of persons to the left of P and S does not sit at the end of the row.
2. Z faces the one who sits third to the right of N.
3. N faces U.

    From this we get the possible arrangements as follows. 4. Only one person sits between W and T. 5. M faces either T or Z and sits second to the left of O.

     From this case 1 and 1a are eliminated as we cannot place W and T. Thus, the final arrangement is as follows.

Hence, L sits third to the left of O.

Persons – 10; L, M, N, O, P, S, T, U, W and Z;

Row 1, South – L, M, N, O, and P; Row 2, North – S, T, U, W and Z;

1. Number of persons to the right of S is two less than the number of persons to the left of P and S does not sit at the end of the row.
2. Z faces the one who sits third to the right of N.
3. N faces U.

    From this we get the possible arrangements as follows. 4. Only one person sits between W and T. 5. M faces either T or Z and sits second to the left of O.

     From this case 1 and 1a are eliminated as we cannot place W and T. Thus, the final arrangement is as follows.

Hence, U sits at the end.

Persons – 10; L, M, N, O, P, S, T, U, W and Z;

Row 1, South – L, M, N, O, and P; Row 2, North – S, T, U, W and Z;

1. Number of persons to the right of S is two less than the number of persons to the left of P and S does not sit at the end of the row.
2. Z faces the one who sits third to the right of N.
3. N faces U.

    From this we get the possible arrangements as follows. 4. Only one person sits between W and T. 5. M faces either T or Z and sits second to the left of O.

     From this case 1 and 1a are eliminated as we cannot place W and T. Thus, the final arrangement is as follows.

Hence, P faces the one who sits second to the left of S.

Persons – 10; L, M, N, O, P, S, T, U, W and Z;

Row 1, South – L, M, N, O, and P; Row 2, North – S, T, U, W and Z;

1. Number of persons to the right of S is two less than the number of persons to the left of P and S does not sit at the end of the row.
2. Z faces the one who sits third to the right of N.
3. N faces U.

    From this we get the possible arrangements as follows. 4. Only one person sits between W and T. 5. M faces either T or Z and sits second to the left of O.

     From this case 1 and 1a are eliminated as we cannot place W and T. Thus, the final arrangement is as follows.

Hence, W faces O.

Persons – 10; L, M, N, O, P, S, T, U, W and Z;

Row 1, South – L, M, N, O, and P; Row 2, North – S, T, U, W and Z;

1. Number of persons to the right of S is two less than the number of persons to the left of P and S does not sit at the end of the row.
2. Z faces the one who sits third to the right of N.
3. N faces U.

    From this we get the possible arrangements as follows. 4. Only one person sits between W and T. 5. M faces either T or Z and sits second to the left of O.

     From this case 1 and 1a are eliminated as we cannot place W and T. Thus, the final arrangement is as follows.

Hence, two persons sit to the right of T.

Venn diagram for the given question as follows

Conclusions

I. All Mobile being Laptop is a possibility - False (As, Only a few Mobile is Laptop is given which means Some Mobile are Laptop and Some Mobile are not Laptop thus All Mobile can never be part of Laptop, so the possibility is false).

II. Some Electric can never be Laptop - True (Given Some Electric is Wire and No Laptop is Wire thus Some Electric which are Wire can never be Laptop)

Hence, Only II follows.

The least possible Venn Diagram of the given Statements is:-

Conclusions:

I. At least some computers are not copies → True (As all laptops are computers and some books are laptops, So some computers are also books. The part of computer which is books can never be copies as no books are copies)

II. At least some computers are copies → False (As all laptops are computers and some books are laptops, So some computers are also books. The part of computer which is books can never be copies as no books are copies, So the statement is false)

Hence, Only I follow.

The Venn diagram for the given statement is as follows

 Conclusions:

I All Red being Green is a possibility → False (Given that some Red is Yellow and No Yellow is Green thus Some Red is also not Green)

II Some Pink can be Red → True (There is no direct relation given between Red and Pink thus the part of the Pink which is not Green can be Red so Some Pink can be Red follows )

Hence, Only II follows.

Additional Information

1. Some X are Y means some part of the X circle is within the Y circle.
2. No X is Y means circle X and Y are not intersecting at all.
3. All X is Y means the whole circle X lies within the Y circle.
4. If there is no exact conclusion for the given statements then the possibility case arises.

The least possible Venn Diagram of the statements is as follows:-

Conclusions:

I. Some Computers are not Laptops → False (If all Laptops are Computers then some Computers are not Laptops are possible but not definite).

II. Some Mobiles are not Laptops → False (If all Laptops are Mobiles then some Mobiles are not Laptops are possible but not definite).

Hence, Neither I nor II follows.

TIPS TO REMEMBER:

1. Some X are Y means some part of the X circle is within the Y circle.
2. No X is Y means circle X and Y are not intersecting at all.
3. All X is Y means the whole circle X lies within the Y circle.
4. If there is no exact conclusion for the given statements then the possibility case arises.
5. If Only X is Y means all Y is X.
6. Only a few:- Some + Some not.

Code for girls: pb

Code for are: tf

Code for classy: sf

The code for girls are classy is: pb tf sf.

Code for beautiful: ba or sa

Code for nice: ag

Code for good: Either nf or gd.

The correct answer for the code of "beautiful nice good" is Either Option 2 or 3.

Word for na: Either boys, but, not, cute.

Word for st: Either boys, but, not, cute.

Word for sf: classy

The correct answer is None of these.

Code for tf: are

Code for nt: sweet

Code for pb: girls

Hence, the correct answer is "are girls sweet".

Code for nf: dating/good.

Hence, Either dating or good is the correct answer.

8 boxes: A, B, C, D, E, F, G, and H.

1. C is placed just above G. G is the bottommost box. There are four boxes placed between D and G.

2. Two boxes are placed between B and G. Number of boxes between A and G is same as between H and B. H is placed above B. 

3. Two boxes are placed between F and D. There are at least 2 boxes between E and B.

Hence, Box H is the topmost.