1. Xiao Qiang has an alarm clock at home, which is 2 minutes faster than the standard time. He wants the alarm clock to wake up at 6: 30 on Monday morning. He sets the alarm clock for 8: 00 on Sunday evening. What time should Xiao Qiang set the alarm clock?

Fast walking time 2*(6+ 12-8)=20 minutes.

Time: 5: 40

The calf has an alarm clock, which is 3 minutes slower than the standard time every hour. One night at 9 o'clock, he set the alarm clock. He wanted to get up at 6: 30 the next morning, so he set the alarm clock at 6: 30. What is the standard time?

Slow time: 3*(6.5+ 12-9)=28.5 points.

Standard time: 6: 58: 30.

There is a clock that is 5 minutes fast every hour. At noon in May 1 will be set accurately. When is the next exact time?

Travel time: 24*60/5=288 hours.

Days: 288/24= 12 days

Time: 1+ 12 = 13 May 13 noon 12.