A group of us were playing Bingo. I noticed something very interesting. There were different Bingo cards with no two cards having the same set of numbers in corresponding column or row. The centre of course was free space.

How many such cards are possible, can you tell?

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Vineet Patawari

Hi, I'm Vineet Patawari. I fell in love with numbers after being scared of them for quite some time. Now, I'm here to make you feel comfortable with numbers and help you get rid of Math Phobia!

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