# A farmer has 25 cows numbered 1 to 25 no 1 cow gives 1kg milk ... no 2 gives 2 kg no 3 give 3kg no 4gives 4kg no 5kg gives 5 kg per day. farmer has 5 sons. now he wants to distribute his cows among his sons such a way that every son take 5 cows & total quantity of milk will be same. how can he distribute

$Total\;number\;of\;sons=5\\*Total\;cows=25\\* Total\;milk=1+2+..+25=\frac{25}{2}(1+25)=325\\* To\;equally\;divide\;it\;in\;5\;sons,,\\* \Rightarrow \frac{325}{5}=65\\* \therefore each\;son\;will\;get\;65\;Kg\;of\;milk\;per\;day\\* So,\;we\;can\;number\;of\; such \;distribution \;where \;every\; son \;get\\*5 cows\; and \;65 \;kg\; milk.\\* Son\;1-cow\;numbered\;1,25,2,24,13 \\* Son\;2-cow\;numbered\;3,23,4,21,14\\* Son\;3-cow\;numbered\;5,22,6,20,12\\* Son\;4-cow\;numbered\;7,19,8,16,15\\* Son\;5-cow\;numbered\;9,18,10,17,11$

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