Why do you have to be 21?

Names for an n sided shape is? What is 6 decades? What is 6.47 times 6.47? Having the same measure? A length of 6 yd 1 ft is equal to what 2ft 1in. 2ft 3in. 18ft 3in. or 19ft? What are some compound words that have the word ready? How many numbers go in to 100 evenly? What is equivalent decimal for 50 percent? What is the value of a mossburg 351ka? What are the advantanges and disadvantages of variance in statistics? What advantage does the metric sisten provide over English units of measure? What is 23 percent of 60000? What can go into 18 and 100? How big is 30MM in diameter? What is the interquartile range in a box plot? What is a closed plane figure which has sides that never cross each other? How many km are in 670m? Is -3.8 an irrational or rational number? What is the answer of 5 divided by3? What are circles divided into 360 equal parts?