there are 4 blocks horizontaly and 4 blocks verticaly and 4 blocks in the middlle and totall there are 16 blocks on the each corner there are 6 ballson each li8ne vertically and horizontally there are 2 balls pairs means there are 8 balls on the corners and 12 bals in the middlle blocks tatal there are 20 bals if we replace the middle 4 balls in the side block they are still 6 balls in the each 4 lines prove mathemetically how?
Mathbot Says...
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