Question
PSLE
Owen and Risa have some marbles. After Owen gives 49 marbles to Risa, he has 20 marbles more than her. How many more marbles than Risa does Owen have at first?
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PSLE
Owen and Risa have some marbles. After Owen gives 49 marbles to Risa, he has 20 marbles more than her. How many more marbles than Risa does Owen have at first?