Six boxes: F, G, H, U, T, and Q

Number of marbles: 6, 25, 36, 60, 49 and 52

i) Box Q is placed at the top.

ii) Two boxes are placed between the boxes Q and U.

iii) The box which has 52 marbles is placed just above box U.

iv) Number of marbles in the box Q is a perfect square number but not 49.

Following are the possibilities we get,

v) Only two boxes are placed below the box which has 16 marbles.

This condition is not satisfied in case 3. So, it is eliminated.

vi) Box F is placed above the box T, which is placed just above box H.

vii) Box G is placed just below the box which has the maximum number of marbles.

viii) Difference between the number of marbles in box T and box Q is 13.

The above statement is satisfied only in case 1.

So the final arrangement is,

Hence, 'Box F' has the highest number of marbles.

Six boxes: F, G, H, U, T, and Q

Number of marbles: 6, 25, 36, 60, 49 and 52

i) Box Q is placed at the top.

ii) Two boxes are placed between the boxes Q and U.

iii) The box which has 52 marbles is placed just above box U.

iv) Number of marbles in the box Q is a perfect square number but not 49.

Following are the possibilities we get,

v) Only two boxes are placed below the box which has 16 marbles.

This condition is not satisfied in case 3. So, it is eliminated.

vi) Box F is placed above the box T, which is placed just above box H.

vii) Box G is placed just below the box which has the maximum number of marbles.

viii) Difference between the number of marbles in box T and box Q is 13.

The above statement is satisfied only in case 1.

So the final arrangement is,

Hence, Box T has '49' marbles.

Six boxes: F, G, H, U, T, and Q

Number of marbles: 6, 25, 36, 60, 49 and 52

i) Box Q is placed at the top.

ii) Two boxes are placed between the boxes Q and U.

iii) The box which has 52 marbles is placed just above box U.

iv) Number of marbles in the box Q is a perfect square number but not 49.

Following are the possibilities we get,

v) Only two boxes are placed below the box which has 16 marbles.

This condition is not satisfied in case 3. So, it is eliminated.

vi) Box F is placed above the box T, which is placed just above box H.

vii) Box G is placed just below the box which has the maximum number of marbles.

viii) Difference between the number of marbles in box T and box Q is 13.

The above statement is satisfied only in case 1.

So the final arrangement is,

Q : 6 → Q = 6² (square root of the number of marbles )

T : 7 → T = 7² (square root of the number of marbles)

Thus, U : 16 → U = 4²

Hence, '4' is the answer.

Six boxes: F, G, H, U, T, and Q

Number of marbles: 6, 25, 36, 60, 49 and 52

i) Box Q is placed at the top.

ii) Two boxes are placed between the boxes Q and U.

iii) The box which has 52 marbles is placed just above box U.

iv) Number of marbles in the box Q is a perfect square number but not 49.

Following are the possibilities we get,

v) Only two boxes are placed below the box which has 16 marbles.

This condition is not satisfied in case 3. So, it is eliminated.

vi) Box F is placed above the box T, which is placed just above box H.

vii) Box G is placed just below the box which has the maximum number of marbles.

viii) Difference between the number of marbles in box T and box Q is 13.

The above statement is satisfied only in case 1.

So the final arrangement is,

Number of marbles in the box F - Number of marbles in the box T = 60 - 49 = 11

Hence, the difference between the number of marbles in box F and box T is '11'.

Given series: LEFT SIDE  Q W E R T Y U I O P A S D F G H J K L Z X C V B N M  RIGHT SIDE

Series in reverse order:

 LEFT SIDE  M N B V C X Z L K J H G F D S A P O I U Y T R E W Q  RIGHT SIDE

Eleventh letter from the right end: 

LEFT SIDE  M N B V C X Z L K J H G F D S A P O I U Y T R E W Q  RIGHT SIDE

Fourth to the left of A:

LEFT SIDE  M N B V C X Z L K J H G F D S A P O I U Y T R E W Q  RIGHT SIDE

G is fourth to the left of the eleventh element from the right end after reversing the series.

Hence, None of these is the correct answer.

Tip:

We know,

After reversing the series the left end will be right and vise versa.

Left & Left = First Left + Second Left

11 + 4 = 15

therefore, the sides have swapped, Right end = Left end.

Hence, the target letter is 15th from the left end of the series.

Given:

12 people – A, B, C, D, E, F, P, Q, R, S, T, and U

2 dates – 11 and 24

1. C went in the first month of the year.

2. P went before C.

3. 4 people went to Andaman between P and F.

4. 2 people went between S and E, who went on the 11th of September.

5. A went to Andaman immediately after F but before S.

6. B went to Andaman in the month with 30 days.

7. D went to Andaman immediately before R and after immediately U.

8. T went to Andaman before Q on the same date but in different months.

(Case 1a will not be possible as it will not satisfy point 8.)

Final arrangement:

Hence, E went to Andaman on September 11.

Given:

12 people – A, B, C, D, E, F, P, Q, R, S, T, and U

2 dates – 11 and 24

1. C went in the first month of the year.

2. P went before C.

3. 4 people went to Andaman between P and F.

4. 2 people went between S and E, who went on the 11th of September.

5. A went to Andaman immediately after F but before S.

6. B went to Andaman in the month with 30 days.

7. D went to Andaman immediately before R and after immediately U.

8. T went to Andaman before Q on the same date but in different months.

(Case 1a will not be possible as it will not satisfy point 8.)

Final arrangement:

T went to Andaman with 2 people before Q.

Hence, A went to Andaman immediately before T.

Given:

12 people – A, B, C, D, E, F, P, Q, R, S, T, and U

2 dates – 11 and 24

1. C went in the first month of the year.

2. P went before C.

3. 4 people went to Andaman between P and F.

4. 2 people went between S and E, who went on the 11th of September.

5. A went to Andaman immediately after F but before S.

6. B went to Andaman in the month with 30 days.

7. D went to Andaman immediately before R and after immediately U.

8. T went to Andaman before Q on the same date but in different months.

(Case 1a will not be possible as it will not satisfy point 8.)

Final arrangement:

Hence, U and D went to Andaman in March.

Given:

12 people – A, B, C, D, E, F, P, Q, R, S, T, and U

2 dates – 11 and 24

1. C went in the first month of the year.

2. P went before C.

3. 4 people went to Andaman between P and F.

4. 2 people went between S and E, who went on the 11th of September.

5. A went to Andaman immediately after F but before S.

6. B went to Andaman in the month with 30 days.

7. D went to Andaman immediately before R and after immediately U.

8. T went to Andaman before Q on the same date but in different months.

(Case 1a will not be possible as it will not satisfy point 8.)

Final arrangement:

F went to Andaman on May 24.

B went to Andaman on October 11.

Hence, 4 people went to Andaman between B and F.

The lease possible Venn diagram for the given statements is as follows

I. Some locks are keys → True (Clearly shown in the diagram)

II. Some locks are not weak → True (As shown in the diagram, that part of locks which is in strong is not weak)

Hence, Both I and II follow.