How many 6s are there in 84?

What do you call an experimental setup in which the experimental variable is missing? Is a dm bigger than a meter? How many square yds in a square mile? What is the unknown positive number when it is increased by 3 and then multiplied by the same unknown number to give a product of 108? What year was the spirograph invented? What percent of 398 is 14? 470 sqmter is equal to how many sqfeets? How many months and weeks in 40 days? You deposit 1200 dollars a year at 4 percent interest what is your balance at the end of 30 years? Cross-sectional is what type of research? What is the percentage of 4 wrong out of 81 questions? What answer is divided 8.05 divided by 7? How many tenths does it take to equal one half? How many 4x4 equal 227 square feet? Does 350 go into 40? How many feet does it take to get to space? Why use a median instead of average? What is 1 x 6 x 9 minus 4? What is the difference between internal and external validity? What is the fraction of 0.8333?