Question

In a certain code, 2 is coded as P, 3 as N, 9 as Q, 5 as R, 4 as A and 6 as B. How is 599423 coded in that code?

• A. EIIDBC
• B. RQPANB
• C. EIMDBC
• D. RQQAPN

Hint:

In digit coding, write all mappings clearly first—then substitute carefully in order.

Answer 1

The Correct Option is D

Concept: Each digit is directly replaced by its corresponding letter.
Step 1: Write given mappings.
\[ 2 \rightarrow P,\quad 3 \rightarrow N,\quad 9 \rightarrow Q,\quad 5 \rightarrow R,\quad 4 \rightarrow A,\quad 6 \rightarrow B \]
Step 2: Apply to 599423.
\[ 5 \rightarrow R \] \[ 9 \rightarrow Q \] \[ 9 \rightarrow Q \] \[ 4 \rightarrow A \] \[ 2 \rightarrow P \] \[ 3 \rightarrow N \]
Step 3: Form coded sequence.
\[ R\ Q\ Q\ A\ P\ N \]
Hence, the coded form is RQQAPN.