A student started out poorly on his first mathematics test. However, he doubled his score on each of the next two tests. The third test grade was 100. What was the student's average test grade? Round to the nearest tenth. (Hint: Work Backwards) 2. While visiting a friend's home, I saw kittens and children playing in the backyard. Counting heads, I got 11. Counting feet, I got 32. How many kittens and how many children were in the backyard? (Hint: Use a Variable) 3. A man wishes to erect a fence along his property by a nearby road. If the fence requires a post every 3 ft, and the fence is to be 30 feet long, how many posts are needed? Disregard the thickness of the posts. (Hint: Draw a Picture) 4. Determine the next three numbers in the following sequence. (Hint: Look for a Pattern) 46, 40, 34, 28, 22,