In the Shanghai trade fair, 10440 visitors came on Wednesday, 77042 visitors came on Thursday, 11968 visitors came on Friday and 62601 visitors came on Saturday. In total, how many visitors visited the Shanghai trade fair?
Three classes will go the book fair at Dallas. The first class will arrive at book fair at the time shown on the clock below:
Each class will spend 45 minutes at the book fair and then leave. The second class arrives at the book fair as the first class leaves, and the third class will arrive as the second class leaves. What time will it be when the third class leaves the book fair ?