Question
PSLE
Warren had puffs and Pierre had scones. Both gave half of what they had to each other. Warren sold 15 puffs and Pierre sold 20 scones. In the end, the ratios of puffs to scones for Warren and Pierre were 1 : 4 and 1 : 2 respectively. How many puffs did Warren have at first?
4 m

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PSLE
Warren had puffs and Pierre had scones. Both gave half of what they had to each other. Warren sold 15 puffs and Pierre sold 20 scones. In the end, the ratios of puffs to scones for Warren and Pierre were 1 : 4 and 1 : 2 respectively. How many puffs did Warren have at first?