As a student of physics you must have problem solving aptitude. You get real concepts when you solve problems based on those concepts.In any competitive exam generally numerical questions are asked. I have recently discussed the concept of wave function in detail. Therefore to clarify your concept I have explained the solution of some numerical problems based on this concept. I have seen that the problems related to normalization of wave function are invariably asked in both competitive and academic exams,therefore I have selected such problems.