Question : Direction: If the first and second letters in the word COMMUNICATIONS were interchanged, also the third and the fourth letters, the 5th and 6th letters, and so on, which letter would be the tenth letter counting from the right end?
Option 1: N
Option 2: U
Option 3: A
Option 4: T
Correct Answer: N
Solution : Assign the numbers consecutively to each letter individually of the given letter cluster as shown below –
| C | O | M | M | U | N | I | C | A | T | I | O | N | S |
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 |
Now, interchange the first and second letters of the given word, also the third and the fourth letters, the 5th and 6th letters, and so on–
| O | C | M | M | N | U | C | I | T | A | O | I | S | N |
| 2 | 1 | 4 | 3 | 6 | 5 | 8 | 7 | 10 | 9 | 12 | 11 | 14 | 13 |
Now, find the letter that would be the tenth from the right from the given table –
| O | C | M | M | N | U | C | I | T | A | O | I | S | N |
| 2 | 1 | 4 | 3 | 6 | 5 | 8 | 7 | 10 | 9 | 12 | 11 | 14 | 13 |
Therefore, N is the letter that would be the tenth from the right.
Hence, the first option is correct.
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