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GCSE Maths coursework Cross Numbers Here is a number square. It shows all the numbers from 1 to 100. I can form cross numbers by placing a cross on this grid. I will use the cross shown below. 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 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 In this investigation, I will try to find a master formula for various functions that I use with a certain cross shape. To do this, I will follow the procedure given below: 1. I will then pick a number on the grid, (labelled as X). 2. Use a mathematical formula using the 4 numbers around it. E.g. (24+33)-(22+13). 3. When an answer is found, I will repeat the formula but pick a different value for X. Repeat this 3 times. If the same answer is achieved, then I will assign an algebraic formula for each number around X. 4. Once I have assigned an algebraic formula for each square, I will replace the numbers in the formula with the algebraic form and...

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