A magic square has the property that each column, each row and each diagonal add up to the same number. The magic square below is a special one called Ramanujan’s square. Notice that each column, row and diagonal sum to 139. What other combinations of squares add up to 139? Enjoy!
|
22 |
12 |
18 |
87 |
|
88 |
17 |
9 |
25 |
|
10 |
24 |
89 |
16 |
|
19 |
86 |
23 |
11 |
Solution:
You would write the number 7 20 times.
7, 17, 27, 37, 47, 57, 67, 70, 71, 72, 73, 74, 75, 76, 77 (two here), 78, 79, 87, 97
How many 7s would you write if you wrote the numbers 1 to 1000.
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