Even or odd Mental calculation

Solve the calculation and choose: is the answer even or odd?

Par o Impar combines addition, subtraction and multiplication with short sessions and two large answer buttons. Practise at your own pace or test your speed across five modes:

- Classic: answer before time runs out and try to beat your record.
- Sprint 60: get as many answers right as you can in one minute. Each mistake costs three seconds.
- Daily Challenge: 20 calculations each day, with one official attempt and unlimited practice afterwards.
- Training: choose addition, subtraction, multiplication or a mix. Play without a timer and see an explanation after each answer.
- Challenge Route: complete 30 levels involving calculations, accuracy and memory, and earn medals.

A short tutorial explains the controls. Pause your game, adjust sound and vibration, and check your records. Progress is saved on this device and all game modes work offline. The game interface is in Spanish.

The app contains advertising. If you previously bought ad removal on iOS, you can restore it from Settings (Ajustes).