Genius! Can you solve this question?

Solve the questions

In an examination, the probability of a candidate solving a questions is (1)/(2) Out of given 5 question in the examination, what is the probability that the candidate was able to solve at least 2 questions?

In each on the following question two equations are given. You have to solve the equations. I. x^(2)=529 II. y=sqrt529

There asre 5 questiions in a question paper. In how many ways can a boy solve one or more questions?