Because we feel it is important that players always receive the math content that is right for them, it was not possible to increase the difficulty of questions when a player encounters a boss.
Instead we've made defeating bosses more challenging by hiding how many hearts they have.
While bosses can be defeated, they will be challenging and you'll need to make use of strategy to defeat them.
Pets and wizard spells have elements, and each element has an advantage over another making them more powerful.
In order to beat a boss, it's a good idea to have team members that have the right elemental type for the boss you are battling.
To read up more on elemental advantage, click here.