Solve This ??????????

 Only skilled people can open this file....... Once you
> succeed to open
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> this file, you will find names of the people who have
> managed to open
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> this...... Now it is your turn!
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> How to open attached file?
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>  A man was traveling to Kasoa
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>  At the bus stop, he met a man with 7  wives   
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>  Each wife has 12 sons and 12 daughters
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> Each daughter of the man's wife had 4 sons and 7
> daughters
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> Each son of the man's wife had 7 sons and 4 daughters
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>  Each grand daughter had 4 friends
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>  How many people got to kasoa?
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>  The number of people who got to kasoa is the password to
> open attached
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> file. (Enter the number in value not in word)
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> Once you have opened it, add Your name and challenge
> others. 
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