Answer: D

Given number : 836492364836

After odd positioned digits are dropped, we get —> 3 4 2 6 8 6

Then, the odd digits are decreased by two and the even digits are increased by one, we get —-> 1 5 3 7 9 7

Sum of the non-repeated digits = 1+5+3+9 = 18

The square of 18 is 324

Answer: E

Given word: REASONING

All the letters are changed to the second succeeding letter, we get —> TGCUQPKPI

First vowel from the left end is U

The second letter to the right of U is P

Third letter from the right end is K

The letters between P and K (as per the alphabetical order) are L, M, N, O (Four)

Final arrangement:

We have,

• Only two persons buy between N and the one who buys Parrot.
• Q buys three persons after R, who buys after N.

From the above conditions, there are two possibilities

Again, we have,

• As many persons buy before Q as after the one who buys Fish.

From the above condition, we get one more possibility i.e., case 1a

Again, we have,

• O buys two persons before the one who buys Cat but doesn’t buy Fish.
• The number of persons buying between P and the one who buys Cat is one less than the number of persons buying after the one who buys Goat.
• The one who buys Duck buys after M.

After applying these above conditions, case-1 and case-1a get eliminated because, in case-1 the number of persons buying between P and the one who buys Cat is one less than the number of persons buying after the one who buys Goat, which is not satisfied and in case-1a the one who buys Duck buys after M, which is not satisfied. Thus, case-2 shows the final arrangement.

Answer: E

Final arrangement:

We have,

• Only two persons buy between N and the one who buys Parrot.
• Q buys three persons after R, who buys after N.

From the above conditions, there are two possibilities

Again, we have,

• As many persons buy before Q as after the one who buys Fish.

From the above condition, we get one more possibility i.e., case 1a

Again, we have,

• O buys two persons before the one who buys Cat but doesn’t buy Fish.
• The number of persons buying between P and the one who buys Cat is one less than the number of persons buying after the one who buys Goat.
• The one who buys Duck buys after M.

After applying these above conditions, case-1 and case-1a get eliminated because, in case-1 the number of persons buying between P and the one who buys Cat is one less than the number of persons buying after the one who buys Goat, which is not satisfied and in case-1a the one who buys Duck buys after M, which is not satisfied. Thus, case-2 shows the final arrangement.

Answer: D

Final arrangement:

We have,

• Only two persons buy between N and the one who buys Parrot.
• Q buys three persons after R, who buys after N.

From the above conditions, there are two possibilities

Again, we have,

• As many persons buy before Q as after the one who buys Fish.

From the above condition, we get one more possibility i.e., case 1a

Again, we have,

• O buys two persons before the one who buys Cat but doesn’t buy Fish.
• The number of persons buying between P and the one who buys Cat is one less than the number of persons buying after the one who buys Goat.
• The one who buys Duck buys after M.

After applying these above conditions, case-1 and case-1a get eliminated because, in case-1 the number of persons buying between P and the one who buys Cat is one less than the number of persons buying after the one who buys Goat, which is not satisfied and in case-1a the one who buys Duck buys after M, which is not satisfied. Thus, case-2 shows the final arrangement.

Answer: B

Final arrangement:

We have,

• Only two persons buy between N and the one who buys Parrot.
• Q buys three persons after R, who buys after N.

From the above conditions, there are two possibilities

Again, we have,

• As many persons buy before Q as after the one who buys Fish.

From the above condition, we get one more possibility i.e., case 1a

Again, we have,

• O buys two persons before the one who buys Cat but doesn’t buy Fish.
• The number of persons buying between P and the one who buys Cat is one less than the number of persons buying after the one who buys Goat.
• The one who buys Duck buys after M.

After applying these above conditions, case-1 and case-1a get eliminated because, in case-1 the number of persons buying between P and the one who buys Cat is one less than the number of persons buying after the one who buys Goat, which is not satisfied and in case-1a the one who buys Duck buys after M, which is not satisfied. Thus, case-2 shows the final arrangement.

Answer: A

Final arrangement:

We have,

• Only two persons buy between N and the one who buys Parrot.
• Q buys three persons after R, who buys after N.

From the above conditions, there are two possibilities

Again, we have,

• As many persons buy before Q as after the one who buys Fish.

From the above condition, we get one more possibility i.e., case 1a

Again, we have,

• O buys two persons before the one who buys Cat but doesn’t buy Fish.
• The number of persons buying between P and the one who buys Cat is one less than the number of persons buying after the one who buys Goat.
• The one who buys Duck buys after M.

After applying these above conditions, case-1 and case-1a get eliminated because, in case-1 the number of persons buying between P and the one who buys Cat is one less than the number of persons buying after the one who buys Goat, which is not satisfied and in case-1a the one who buys Duck buys after M, which is not satisfied. Thus, case-2 shows the final arrangement.

Answer: C

Answer: A

Answer: B

Answer: C