Anomaly puzzle:
Find the outstanding figure. Take the color and shape of the figure into account.

Path finder:
Start at the marked position and follow the arrow instructions to find the destination.

Mental calculation:
Warm up with simple math calculations.

Sherlock calculation:
Find a formal to get to the requested goal.

Chain calculation:
Solve complex formulas.

Color confusion:
Keep focused.

Fraction calculation:
Solve the fractions.

Height comparison:
Find the formal with the highest result.

No tracking. Open source.