Slips of paper numbered 1–20 are folded and placed into a hat, and then a slip of paper is drawn at random. What is the probability the slip drawn has a number which is a multiple of 4 or 5?

To start, we need to figure which numbers, between 1 and 20 are divisible by 4 and 5. Those divisible by 4 are 4, 8, 12, 16 and 20. Those divisible by 5 are 5,  10, 15 and 20. There are a total of 8 unique number divisible by 4 or 5. Therefore, the probability of picking a number divisible by 4 or 5 is 8/20 or 2/5 or 40%.

Step-by-step explanation:

127

whether it's diameter, or radius, i believe if i remember correctly from school, every amount has to always add up to 180. so if you take 53, and starting adding, long story short, taking 127 and adding it to 53, gives you 180.