Question
PSLE
Archie had puffs and Sam had tarts. Both gave half of what they had to each other. Archie sold 10 puffs and Sam sold 40 tarts. In the end, the ratios of puffs to tarts for Archie and Sam were 1 : 6 and 1 : 4 respectively. How many puffs did Archie have at first?
4 m

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PSLE
Archie had puffs and Sam had tarts. Both gave half of what they had to each other. Archie sold 10 puffs and Sam sold 40 tarts. In the end, the ratios of puffs to tarts for Archie and Sam were 1 : 6 and 1 : 4 respectively. How many puffs did Archie have at first?