1. THE RISKS OF LIFE Video Conference #3 Scams & Cons

2. Psychic Powers How does this card trick work?

3. The shuffle Cards are ordered 1234512345 Cutting the cards does not change the cyclic order. For example, a cut between 2 and 3 will move the card order to 3451234512, but the original 1234512345 is still there.

4. The 5 Card Piles the secret move Assume cards are in their original order…….. Counting 5 cards gives 12345 in one pile and 54321 in another. This is a PALINDROMIC STACK (values in one pile are exactly reversed in the other)

5. The Swaps The number of swaps is always one less than the number of cards in the pile. Consider only 3 card values. You could do 2 swaps in the first pile OR 2 swaps in the second pile OR 1 swap in the first pile and 1 swap in the second pile

6. 2 swaps in the first pile 1 3 2 3 1

7. 2 swaps in the first pile 3 2 3 1 1

8. 2 swaps in the first pile 3 2 3 1 1 2

9. 2 swaps in the first pile 3 2 3 1 1 2

10. 2 swaps in the second pile 1322311322312

11. 12 3 1 3

12. 2 swaps in the second pile 1 2 3 1 3 2

13. 2 swaps in the second pile 1 2 3 1 3 2

14. 1 swap in the first pile 1 swap in the second pile 1 32 3 1

15. 1 swap in the first pile 1 swap in the second pile 32 31 1

16. 1 swap in the first pile 1 swap in the second pile 223113 2231132

17. 223113 2231132

18. Maths behind the Scam This will work any number of cards N that are placed in order in palindromic stacks. When we make N-1 swaps, as one card is moved down its equivalent rises in the other stack so that the ones meeting on top of the piles match.

19. Monty Hall Problem Probability puzzle based on an American Gameshow Lets Make a Deal Named after the host Monty Hall

20. Numbers Monty Hall 2009

21. Monty Hall Activity In pairs, use your cups and prize to simulate the Monty Hall problem. Try swapping and not swapping as many times as possible. Decide on one of the following conclusions: To increase your chances of winning you should: Swap? Not Swap? Does it matter?

22. Monty Hall Activity SwapNot Swap Win Lose

23. Results (% of wins) WydeanSt Josephs Karachi Swap Dont Swap

24. BBC Horizon, Broadcasted 1 st April 2009 Alan and Marcus Go Forth and Multiply

25. Swap or Not? CUP 1CUP 2CUP 3 Scenario 1Car Scenario 2Car Scenario 3Car

26. Swap or Not? CUP 1CUP 2CUP 3 Scenario 1Car Scenario 2Car Scenario 3Car

27. Swap or Not? CUP 1CUP 2CUP 3 Scenario 1Car Scenario 2Car Scenario 3Car

28. Swap or Not? CUP 1CUP 2CUP 3 Scenario 1Car Scenario 2Car Scenario 3Car

29. Swap or Not? CUP 1CUP 2CUP 3 Scenario 1Car Scenario 2Car Scenario 3Car

30. Swap or Not? CUP 1CUP 2CUP 3 Scenario 1Car Scenario 2Car Scenario 3Car DONT SWAP

31. Swap or Not? CUP 1CUP 2CUP 3 Scenario 1CarLOSE Scenario 2Car Scenario 3Car DONT SWAP

32. Swap or Not? CUP 1CUP 2CUP 3 Scenario 1CarLOSE Scenario 2CarWIN Scenario 3Car DONT SWAP

33. Swap or Not? CUP 1CUP 2CUP 3 Scenario 1CarLOSE Scenario 2CarWIN Scenario 3CarLOSE DONT SWAP

34. Swap or Not? CUP 1CUP 2CUP 3 Scenario 1CarLOSE Scenario 2CarWIN Scenario 3CarLOSE DONT SWAP CUP 1CUP 2CUP 3 Scenario 1Car Scenario 2Car Scenario 3Car SWAP

35. Swap or Not? CUP 1CUP 2CUP 3 Scenario 1CarLOSE Scenario 2CarWIN Scenario 3CarLOSE DONT SWAP CUP 1CUP 2CUP 3 Scenario 1CarWIN Scenario 2Car Scenario 3Car SWAP

36. Swap or Not? CUP 1CUP 2CUP 3 Scenario 1CarLOSE Scenario 2CarWIN Scenario 3CarLOSE DONT SWAP CUP 1CUP 2CUP 3 Scenario 1CarWIN Scenario 2CarLOSE Scenario 3Car SWAP

37. Swap or Not? CUP 1CUP 2CUP 3 Scenario 1CarLOSE Scenario 2CarWIN Scenario 3CarLOSE DONT SWAP CUP 1CUP 2CUP 3 Scenario 1CarWIN Scenario 2CarLOSE Scenario 3CarWIN SWAP

38. THE SYSTEM

39. Channel 4 Broadcast. 1 st February 2008. Derren Brown, The System.

40. 81 people

41. 7776 people

42. Channel 4 Broadcast. 1 st February 2008. Derren Brown, The System.

43. Pyramid Selling Compulsory Investigation Lindis Womens Networking Scheme You invest £3,000 with the promise of £24,000 in return! How does this scheme work? What is the problem with this scheme? Why is it illegal?

44. Video Conference #4 Be Prepared! (Thursday March 25 th ) Follow-up work Presentations Mathionaire (part 2: £1,000 - £32,000) Remember to look at the compulsory investigation question on the website as one question will be based on it.