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Investigation of T-Shape.

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Introduction

Investigation of T-Shape:

This is a grind9 by 9, and there is at shape in the grind which is highlighted in colour red. It is called t-Shape.

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The number 20 at the bottom of the t-shape is called t- number (n), all the numbers

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Middle

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As you see when t-number goes up 1 the t-total goes up 5

So, ratio of t-number and t-total is 1 : 5

Another way to work out the t-total is by formula

n-19

n-18

n-17

n-9

n

             So, total=n+(n-9)+(n-17)+(n-18)+(n-19)

                   =5n-63

          So,   t=5n-63, when t is

...read more.

Conclusion

Now here is an example of using the formula ( 5n – 63 = t-total )

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5 * 25 – 63 = t-total

5 * 25 – 63 = 62

Check the answer

t-total = 6 + 7 + 8 + 16 + 25

=62

This formula works

...read more.

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