Did aryabhatta discover zero

What are the two legacies of Indian Mathematics? Why do 3 countries use standard measurement? What is 6.8 billion minus 309 million? How many years from 78BC to 15BC? What is 60.00 divided by 28? What is the rule for finding a number in the second row of the table if you know the corresponding number in the first row? Is 51 a multiple of 4? What is a 3 dimensional layered structure? What is 42.5 divided by1.5 equal? Is a IQ of 132 good for a 9 year old? How is logging bad? What is 279 divided by 40? What number do you divide by -10 to get -11? The spirit called Evil Forest says you kill a man on the day that his life is sweetest to him How does this apply to Okonkwo in Chapter 13? What is the shape of the face a tetrahedron have? What is 2 plus (5x4)-7 plus 2? What is 60 for a percentage of 68? What goes into 875 and 1000 evenly? Is thirty eight a compound word with a hyphen? What were Roman pillars made out of?