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Introduction Here is a number grid with a T-shape inside: 1 2 3 4 5 6 7 8 9 This number grid is a 3 X 3 number grid because it has 3 columns across: 1 2 3 and three rows down: 1 4 7 The T-shape in the middle contains three squares at the top going across and two squares dropping vertically from the central square creating a T-shape. The number at the base of the T-shape is called the T-number: In this piece of course work I am going to signify the T-number in algebraic expression as 'x': The T-total is given by the sum of the numbers within the T shape. For example if I were to use a 3 X 3 number grid the T would look like this: 1 2 3 4 5 6 7 8 9 Now if add all the numbers in the T shape it would total 19. This is the T-total for this T-shape. The T-shape In this section I am going to try to find a formula which shows how to calculate the T-total and...

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