Cyberchase

Cyberchase is a Canadian-American animated educational children's television series on PBS Kids. The series focuses around three children from Earth: Jackie, Matt, and Inez. They were brought into Cyberspace, a digital universe, in order to protect the world from the villain Hacker. These kids are able to prevent Hacker from taking over Cyberspace by means of problem-solving skills in conjunction with basic math. In Cyberspace, they meet Digit, a "cybird" who helps them on their missions.