Write #3,6,7, and 8 answers in simplified Chinese characters

Miguel is making an obstacle course for field day. at the end of every sixth of the course, there is a tire .at the end of every third of the course, there is a hurdle. at witch locations of the course will people need to go through more than one obstacle?

How many speedboats are there in the avakin life's paradise island social spot?

What was a problem faced by many newly independent african countries