Question
Carl, Oscar and Ivan have some marbles. The ratios of their marbles are as follows:

Carl : (Carl + Oscar + Ivan) = 1 : 4
Oscar : (Carl + Ivan) = 1 : 5

Ivan has 10 marbles more than Oscar. In the end, Ivan gives away all he has to Oscar and Carl so that both Oscar and Carl end up with the same number of marbles, how many marbles has Carl received from Ivan?
4 m

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Carl, Oscar and Ivan have some marbles. The ratios of their marbles are as follows:

Carl : (Carl + Oscar + Ivan) = 1 : 4
Oscar : (Carl + Ivan) = 1 : 5

Ivan has 10 marbles more than Oscar. In the end, Ivan gives away all he has to Oscar and Carl so that both Oscar and Carl end up with the same number of marbles, how many marbles has Carl received from Ivan?