Each time the admission period starts universities are facing the same issues and need to come up with a solution how to fill in their quota with the best applicants possible. People wonder if there is a match for everyone to marry or some people are destined not have any choice at the end. Luckily, mathematics have an answer to both of these questions. This work presents the algorithm of Gale and Shapley to solve the problems. Moreover, the answer is given in the casual language that most people can easily understand. Interesting topics, simple language and coherent logic prove that mathematics exist everywhere and that it can be available to all.