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T- Total 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 Look at the T-shape drawn on the 9 by 9 number grid. The numbers in this shape are added together to make the T-Total, which would be in this case 1+2+3+11+20=37. So the T-Totals number would be 37. As I go on I am sure I will find a pattern which may help me find a rule. T-Totals T-Number 2+3+4+12+21=42 21 3+4+5+13+22=47 22 4+5+6+14+23=52 23 The number at the bottom of the T-shape is called the T-number. The T-number for this T-shape is 20. If you take the other numbers in the T-Shape away from the T-Number you get a T-Shape like this. T-17 T-18 T-19 T-9 T You will notice that the centre column of the T-Shape is going up in 9's this is because of the table size. With the table set out like this a formula can be worked out to find any T-Total on this a 9x9 grid. This is done in the working below: - T-total = T-19+T-18+T-17+T-9+T = 5T-63 Now...

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