Xavier Aptitude Test 2021 Paper

Question : 21 of 100

Marks: +1, -0

An encryption system operates as follows:
Step 1. Fix a number $k (k≤ 26)$
Step 2. For each word, swap the first $k$ letters from the front with the last $k$ letters from the end in reverse order. If a word contains less than $2k$ letters, write the entire word in reverse order.
Step 3. Replace each letter by a letter $k$ spaces ahead in the alphabet. If you cross $\Z$ in the process to move $k$ steps ahead, start again from $\A$ .
Example: $k = 2$ : zebra → arbez → ctdgb.
If the word “flight” becomes “znmorl” after encryption, then the value of $k :$

5
4
7
Cannot be determined uniquely from the given information
6

Validate

Solution:

Flight become

\znmorl

Let's assume

k>3

So flight will become

\thgilf → \znmrol

.
Hence the value of

k

will be

6

Go to Question:

Prev Question

Next Question