Question

(2) Take nine numbers forming a square in a calendar and mark the four
numbers at the corners.
3
4
5
10
11
12
17
18
19
Add the squares of diagonal pairs and find the difference of the sums.
32 + 192 = 370
172 +52 = 314 370 - 314 = 56
i) Do this for other such nine numbers.​

Answer 1

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