What is the name of US counting system?

Is 83 a odd or a even or a prime or a composite number? What is 4.56 in word form? What are difference between a hypothesis and hypothesis statement? What percent of 118 is 531? Do some normal probability distributions have different means and different standard deviations? What is fifteen times sixteen squared? 2x plus 5y equals 2 -3x - y equals -3? What is the fraction for 17.50? What equals 384 in addition? How many cm is in 2.5km? How do you write out 23.5 million? What is the frequency of 17 waves crash onto a beach every 48.8 seconds? How do you identify the x and y intercept for an equation? What is 60 round to the nearset hundredth? How do you write 0.073 as a fraction? How many miles per hours does the earth travel around the sun? How many times does 2 go into 140? What times what equals 512? What are three consecutive integers the sum is 186? Subtract the hexadecimal number 1234 from DA57 using twos complement addition method?