1、For all positive integer m, m = 3m when m is odd and m = 1/2m when m is even. Which of the following is equivalent to 9 × 6 ?
Answer：27
2、According to the directions on a can of frozen orange juice concentrate, 1 can of concentrate is to be mixed with 3 cans of water to make orange juice. How many 12-ounce cans of the concentrate are required to prepare 200 6-ounce servings of orange juice?
Answer ：25
3、Six machines each work at the same constant rate, together can complete a certain job in 12 days. How many additional machines, each working at the same constant rate, will be needed to complete the job in 8 days?
Answer：3
4、If a quality control check is made by inspecting a sample of 2 lightbulbs from a box of 12 lightbulbs, how many different samples can be chosen?
Answer：66
5、When a certain tree was first planted , it was 4 feet tall, and the height of the tree increased by a constant amount each year for the next 6 years. At the end of the 6th years, the tree was 1/5 taller than it was at the end of the 4th year. By how much feet did the height of the tree increase each year?
Answer： 2/3
各位大大好 以上五題PS可以麻煩大家幫我解惑一下嗎? 真的很謝謝了
