What is 1 fifth of the air?

Why give the odd numbers to file papers? How thick is 0.20mm? What is the value of x in the equation x 3 equals 45? Are numbers 27 and 70 relatively prime? How many gallons of water in a 20' x 4' pool? What is 6 trillion times 11.7 billion? Can you come at 3 o'clock? What is the standard form of eight thousand sixty six? What is 58.3 to the nearest unit? How do you write seventy-five hundred thousand one? What is a true statement about federalist? How do you write 305.00? What is vertical vertex? What does gender imbalance mean? What is the best estimate of the length of a bicycle in meters? How many days are there in eleven years? How much is 5 fl oz? What is the simplest for 10 over 16? What is 3 over 7 as a decimalRounded to 3 places? What three one digit numbers have a palindrome as the square number?