What is the head circumference of a 6 year old child?

What time is 15 minutes before noon? How many digits in numeric system? Is there an adjective or an adverb? Does a lemon have infite lines of symmetry? How much 12 drummers drummering cost? What are the 4 names for dhmo aliases? What does the word opposite signs mean in math? What times what gives you 819? What time what equals 15? Was Matthew's Gospel written for a Jewish audience? What is the average of 100 95 0 93 89? How many ways are there to make 24 using fractions? How many microliters are in one millimeter? What is 333 divided by 10? Can anyone solve 3x plus y equals 10 and 3x-2y equals -5 as a simultaneous equation and show their working? X2 plus 72 18x? What is two thrids as a decimal? What is the speed of light in scientific notation? What is the probability of getting at least one head in 5 tosses of a coin? What is the average speed of a car that speeds up from 60 miles per hour to 70 miles per hour in 8 seconds?