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[Post New]21 Aug 2007 23:56:11 IST
    Subject: matrices
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chimanshu_007 (11640)

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how to find rank in a shrtcut way

see by an example.................

1.....2.....3.....0
2.....4.....3.....2
3.....2.....1.....3
6.....8.....7.....5

now see the digits wich are repeating

here 2(4 times) and 3(4 times)

so rank is no. of repetitions of larges digit (here three)

so rank is four



if no repetition then
rank = (sum of elements of primary diagonals) - (sum of elements of secendary diagonals)
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