John has a certain number of marbles in his pocket. He is able to divide his marbles equally to five of his friend but while trying to divide that same amount of marbles to seven of his other friend he found out that some marbles are left out. What could be the number of marbles that John have?  Answers
A) 70 B) 21 C) 50 D) 35 E) 105
since John was able to divide his marble equally to 5 of his friend but not to 7 of his friend so the total marbles that he has should be divisible by 5 but not by 7.   75, 35 and 105 are all divisible by 5 and 7--- ruled out   we are now left with 21 and 50, here 21 is again divisible by 7-- wrong again.   The answer has to be 50. [ divisible by 5 but not by 7 ]   answer: (50)
<result>C</result>
John has a certain number of marbles in his pocket. He is able to divide his marbles equally to five of his friend but while trying to divide that same amount of marbles to seven of his other friend he found out that some marbles are left out. What could be the number of marbles that John have?