Coding, Decoding & Series
A 24-question test of symbolic manipulation: letter-shift ciphers, reversal codes, alphabet-position number codes, and letter/number series spanning arithmetic, geometric, prime, factorial and mixed-rule progressions. Cipher items and their keys are machine-generated and machine-verified, so every answer is exactly derivable. A high-signal screen for trainability in rule-based work — the candidate who extracts the rule fast will show it here. 20 minutes.
- Create a free account — it takes under a minute.
- Complete the assessment in one sitting.
- Get instant AI feedback and add the result to your Skill Passport.
Free to take. Build your verified Skill Passport as you go.
Methodology: Original AssessAll item bank; cipher items are machine-generated with machine-verified keys. Follows international coding-decoding and series conventions used in graduate volume screening. Not affiliated with any third-party instrument.