Classic Sudoku
Select a cell, use the number pad, add pencil notes, and track your best times.
Calc Cage
Fill every row and column with 1–4 exactly once. Match cage targets using the shown operation.
Number Sprint
A fast-paced arithmetic challenge for mental math practice and focus training.
Ready?
Choose a level and press Start.
Sequence Detective
Spot the pattern and identify the missing number in the mathematical series.
Find the missing term
Your Progress
All data is stored locally on this device. No servers, no tracking.