What is puzzling question called?

How o you find volume? How many feet deep in the ground the freezing will go? What is the estimated product of 3.78 and 42.01? Is a inch smaller than a centermeter? What is a fractions used to represent? What is sixteen in the Binary code system? Which was the cause of the increased mixture of the Egyptian and Nubian cultures around the 1500s B.C.? How many 18 X 18 tiles will you need to cover 300 Sq Ft? 1 liter is how many glasses of water? Is it true about 40 percent of collisions result in an injury? What is the probability of drawing a queen and heart from a standard deck of cards? Is the bible written in code? How many btu's to raise 1 liter of water 1 degree? How do you convert kilometers to scientific notation? How many times does 28 go into 392? What are the square roots of 1-30? In which parallelogram are the diagonals perpendicular? Why does 2.5 l motor cut out just past idle unless you accelerate hard? Is 3 over 8 bigger than 1 over 3? What is 1.6666666 as a fraction?