A sum of money is shared among three brothers. The the eldest receive 7/13 of it and the next receives 2/3 of the remainder. What fraction does the third brother receives?
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ANSWER = 2 /13
total money = 39 / 39 [ LCM of 13 and 3 = 39]
1st son = 7 /13
remaining = 6 / 13
2nd son = 2 /3 of 6 / 13
= 12 / 39
3rd son = 39 / 39 - ( 7/ 13 + 12 / 39)
= 39 / 39 - 33 / 39
= 6 / 39
= 2 / 13
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