What is your Grade for 12 out of 15 questions?

Can we add dissimilar term? Where in the Bible does it mention idle time is the devil's workshop? What would happen if zero was not invented? Why 1024 is 1000 in computer world? How many constribution of aryabhatta in mathematics? Why is it important to line up the decimal points when adding or subtracting but not when multiplying? How many hectograms are in a kilogram? What number is 7 units ot the left of -1? Discriton of math typical? How many combined days are in the last four months of a calendar year? What times 9 is 15? What is 0.00056 rounded to the nearest liter? Which two complementary forces keep the Sun from blowing itself up? What if the number system did not contain 0 how would that effect people? How do you find dimensions by factoring? Who are the ten youngest people to qualify as an actuary? What shape whose faces are all squares? What is the square root of 11 over 25? What is the standard form of the roman numeral MDXI? What is the improper fraction of 25 over 36?