Question
Perry, Sean and Oliver had a total of 562 marbles at first. After a week, the number of Perry's marbles became 3 times the number of marbles he had at first. The number of Sean's marbles decreased by 322. Oliver had one-quarter as many marbles as he had at first. In the end, the three boys had the same number of marbles.
  1. How many marbles did Oliver have at first?
  2. What was the total number of marbles that the three boys had in the end?
5 m
(a)

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(b)

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Perry, Sean and Oliver had a total of 562 marbles at first. After a week, the number of Perry's marbles became 3 times the number of marbles he had at first. The number of Sean's marbles decreased by 322. Oliver had one-quarter as many marbles as he had at first. In the end, the three boys had the same number of marbles.
  1. How many marbles did Oliver have at first?
  2. What was the total number of marbles that the three boys had in the end?