Question
PSLE
Mrs Kong had a bottle of oil. She used an equal amount of oil each day. At the end of the eighth day, she had 630 mℓ of oil left. At the end of the tenth day, she had one-third of the bottle of oil left. How many litres of oil were there in the bottle at first?
2 m

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PSLE
Mrs Kong had a bottle of oil. She used an equal amount of oil each day. At the end of the eighth day, she had 630 mℓ of oil left. At the end of the tenth day, she had one-third of the bottle of oil left. How many litres of oil were there in the bottle at first?