GATE CS 2015 Set 3 QGA-1 — General Aptitude

To find the coding pattern, let us analyze the relationship between the letters of the word ROAD and its coded form URDG by looking at their positions in the English alphabet:

• $R \xrightarrow{+3} U$ (since $18 + 3 = 21$)
• $O \xrightarrow{+3} R$ (since $15 + 3 = 18$)
• $A \xrightarrow{+3} D$ (since $1 + 3 = 4$)
• $D \xrightarrow{+3} G$ (since $4 + 3 = 7$)

The pattern is a shift of $+3$ for each letter.

Applying the same $+3$ shift rule to the word SWAN:

• $S \xrightarrow{+3} V$ (since $19 + 3 = 22$)
• $W \xrightarrow{+3} Z$ (since $23 + 3 = 26$)
• $A \xrightarrow{+3} D$ (since $1 + 3 = 4$)
• $N \xrightarrow{+3} Q$ (since $14 + 3 = 17$)

Therefore, SWAN is written as VZDQ.