Did aryabhatta discover zero

Give a lesson plan of standing line and sleeping line for nursery class? What is 4 divided by 404? Words to describe the smallest and the biggest? What is the ones place in a decimal? What is 0.001 expressed in scientific notation? How can you use algebra tiles to add or subtract algebraic expression? What is the product 322 and 25? What is a rolling average? Is 43 mg greater than 5g? How many possible pentominoes can be formed? What is the detention time in hours of a 120 foot diameter tank that holds 40 foot of water with a flow of 1.4 Million Gallons Per Day? 1 1 var means how many sq ft? Why do we round numbers? How do you write 1.56 billion in number? What type of a money coin is a 1736 with inscription saying vtraque vnum? What is a prime number and are one and two? Two pump are being used one pump 5000 L in 20 min and other 5000 L in 25 min how long will it take the two pumps together to pump 5000 L? How do the 2 different sides of the island affect his hopes of getting rescued? What Century was 1523 in? How do you express the scientific notation 57.573?