The HumanCalc blog

Mental math & memory practice guides.

Mental math and memory guides with worked examples you can try. Learn the rules, choose a practice routine and understand what your score means.

How to play · 3 min read

Learn Flash Anzan with a worked number sequence, HumanCalc's actual level settings and a simple way to practise adding numbers as they appear.

Practice · 3 min read

Try a short mental math routine with worked addition and multiplication examples, a timed HumanCalc round and a simple accuracy check.

How to play · 3 min read

Understand Dual N-Back with a turn-by-turn N=2 example, Position and Sound controls, common matching mistakes and HumanCalc's progression rule.

Practice · 3 min read

Compare sequential addition and written mental math expressions, with worked examples and a simple way to choose your first HumanCalc game.

Research & scores · 2 min read

Understand HumanCalc's five-round reaction time average, early-tap penalty and why device and input settings matter when comparing attempts.

Research & scores · 2 min read

Separate improvement on a practiced game from broader cognitive claims. Read primary research links and learn how to compare HumanCalc scores fairly.