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Number/Symbol Substitution
Processing speed is your brain's ability to quickly notice information, understand it, and respond correctly. These activities help you practice making fast, accurate decisions in a simple and fun way.
Processing Speed
Attention
Working Memory
Visual Scanning
3–5 minutes
Easy · Medium · Hard
How to play
- 1.A reference key shows which symbol matches each number
- 2.A number prompt appears — tap the matching symbol
- 3.Build streaks to earn bonus points!
- 4.Accuracy matters more than speed
Example key
1
★
2
●
3
▲
4
■
If the prompt shows 3, tap ▲
This activity is for general brain wellness and practice only. It does not diagnose, treat, or prevent any medical condition.