What is a dekayard?

What is the number halfway between 8000 and 9000 in two thousand? What is the median of 2 8 0 5 9 7 9 5 9? What is twice as old as 31? What is the meaning of addition with carrying? What over 4 equals 18 over 72? When is scientific notation used? What is the greatest of one half one fourth and five eighths? What is the greatest common factor of 35 50 60? What are the uses of the product DocuPen? What is 28 000 divided by 10? Which dialog box specifies a cell containing an error and the type of error such as Divide by Zero Error? What is 10 degrees F to 305 K? What is 318 in roman numerals? What is 5 percent of 1600? What is the ratio of one triangle in a square? What divides by 3 equals 7? How do you find area of an irragular shape if perimeter is given? What does dindex mean in math? In one point perspective what is the line called that separates the ground and the sky? Using each digit only once list all possible 3 digit numbers that can be made with 2 or 4 or 7?