How this test works:
- You are shown a series of letters following a logical rule (e.g., A → C → E → G → ?)
- Analyze the relationship between consecutive letters
- Choose the letter that logically continues the series
- Receive immediate feedback before the next question
Rule types by difficulty:
- Easy: Constant intervals (+1, +2, +3) - such as B, D, F or M, N, O
- Medium: Wider intervals, descending series, or simple alternations
- Hard: Changing intervals (+1, +2, +3, +4), repeating letters, or compound rules
Test modes:
- Time-based: Complete as many questions as possible within 60 seconds
- Trial-based: Work through 20 questions at your own pace
Strategies for success:
- Calculate the alphabetical distance between each pair of letters
- Determine whether the series moves forward or backward
- Watch for repeating interval patterns (e.g., +1, +3, +1, +3)
- Some questions use two interwoven sequences