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Symbol Coding

Comprehensive notes, formulas, and practice questions for Symbol Coding.

Symbol Coding

Symbol Coding

What is Symbol Coding

In symbol coding, each letter (or word) is replaced by a symbol — such as @, #, $, %, *, &, or a shape. The question gives you one or two coded words as examples so you can build a symbol-to-letter map. Once you have the map, you can encode a new word or decode a symbol string. Symbol coding tests careful pattern matching rather than arithmetic.

Step-by-Step Method

  1. List each coded example given in the question.
  2. Match letters to symbols one by one: if CAT = @#andBAT= and BAT = %#, then T=$ and A=# must be shared; comparing gives C=@ and B=%.
  3. Build a key table: Letter → Symbol.
  4. Use the key to decode the asked symbol string or encode the asked word.
  5. Double-check each symbol against your key — do not guess for symbols that were not given.

Worked Examples

Example 1: In a code, PEN = !@# and NET = #@. Decode !#.

  • From PEN: P=!, E=@, N=#.
  • From NET: N=#, E=@, T=*. (Consistent with PEN coding.)
  • Decode !*#: ! = P, * = T, # = N.
  • Answer: PTN.

Example 2: In a code, BOOK = %^^& and COOK = @^^&. What is the code for COOL?

  • B=%, C=@, O=^, K=&.
  • COOL: C=@, O=^, O=^, L=?
  • L was not given — the question would provide it or ask only for decodable letters.
  • If L=* is given elsewhere: COOL = @^^*.

Common Traps

  • Assuming a symbol always maps to the same letter across different questions — each question has its own key.
  • Getting confused when the same letter appears twice in a word (OO in BOOK = ^^, confirming O=^).
  • Missing a symbol because it looks like punctuation — treat every character in the coded word as a symbol.

Quick Check

  1. In a code, SUN = #@% and NUT = %@. What does #@ decode to?
  2. Using the same code above, encode the word TUN.

Key Takeaways (TL;DR)

  • What is Symbol Coding
  • Step-by-Step Method
  • Worked Examples
  • Common Traps

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