Question

If A, B, C, D,.........Z represents numbers from 1, 2, 3,...... 26. Key can be anything from 1 to 25. For a key of 2, every letter shifts 2 places. To right A becomes C, Z becomes B and so on. If key is equal to 9, match the normal letters with encrypted letters.

$\begin{array}{cc}\text{Normal Letter}& \text{Encrypted Letter}\\ 1A& aY\\ 2F& bD\\ 3P& cO\\ 4U& dI\\ 5Z& eJ\end{array}$

• A. 1b, 2c, 3a, 4e, 5d
• B. 1e, 2c, 3b, 4d, 5a
• C. 1e, 2c, 3a, 4b, 5d
• D. 1e, 2b, 3c, 4d, 5a

Answer 1

The correct option is C

1e, 2c, 3a, 4b, 5d

Since key = 9, we have to shift letters 9 places to the right.

$\begin{array}{cccc}\text{Given position}& \text{Key}& \text{Encrypted letter at position}& \text{Encrypted letter}\\ \text{A-1}& 9& 10& J\\ \text{F - 6}& 9& 15& O\\ \text{P - 16}& 9& 25& Y\\ \text{U - 21}& 9& \text{30-26 =4}& D\\ \text{Z - 26}& 9& \text{35-26 =9}& I\end{array}$