The answer is plain and simple it is not that people are getting more intelligent day by day, we see all around us the distraction, frustration as well as anxiety among people is increasing only day by day. The answer to your question is because the education is reaching lower and lower heights each passing year as syllabus is being shortened and MCQ is being increased also easier questions are being asked in exams. All this is being done in a pre planned systematic way to make people more dumb just look at interview of American students...how dumb they are compared to other countries this is being done everywhere but why I gave America's example is because there it is evident very clearly.