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Question 1 of 3
There are 4 bottles labelled P, Q, R and S.
These bottles contained a total of 1620 marbles.
The number of marbles in S was halved while the number of marbles in P and Q were increased by 110 and decreased by 30 respectively.
Eventually, the number of marbles in all 4 bottles became equal.
How many marbles were there in bottle S at first?