Did aryabhatta discover zero

-7 plus x equals 13 x equals? What is the value of roman numeral MDCXV? If somone is born in 1985 how old are they? What has scales but cannot be measured? How many days in 24 weeks? How does child management works in Qt? What Chinese coin has 50 on one side flowers on other? What is one fourth of two? Type the equation that shows the pattern among this set of ordered pairs 0 -5 1 0 2 5 3 10 use slope intercept form y mx plus b? What describes the Locus of all points that are equidistant from 2 lines? What are six numbers with a range of nine and a mode of five? What are the units smaller than millimetre? Can you round 45 to the nearest hundred? What is 800 plus 10? How much does a person weigh if he is 5 feet 10 inches and wears size 13 shoes? How do you set up an equation in slope intercept form? Are two skew lines always coplanar? What is fractional notation for 5.4? Which quadrilateral has 2 pairs of parallel sides and its opposite sides are congruent? Which whole number values of x greater than 0 is the value x to the second power is greater then the value of 2 to the power of x?