2. Chess board maths! By CHRIS 2 = Chris de Jager & Chris van Zyl Tshwane University of Technology

3. What is the volume of grains of rice which can be placed on the chess board? Place 1 grain of rice on square 1, 2 on square 2 4 on square 3 Keep on doubling it each time. Add it all together at the end (Good luck!) (Hint : 255 grains of rice = 5ml)

4. 1248166432128 256

5. 1=2 0 2=2 1 4=2 2 8=2 3 2424 2626 2 63 2525 2727 2828 2 62

7. 1 2323 4747 8 15 16 31 64 127 32 63 128 255 256 511 2 62 2 63 -1 2 63 2 64 -1

8. Total for first row = 255 grains = 5 ml = 1 teaspoon

9. 500 ml grains of rice d h h = 60 mm d = 180 mm

12. Total volume of grains of rice d h h = 5,37 km d = 16,1 km

13. = Approximately the size of Mount Kilimanjaro!