Question
PSLE
Mrs Ng had a bottle of oil. She used an equal amount of oil each day. At the end of the seventh day, she had 1170 mℓ of oil left. At the end of the tenth day, she had half 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 Ng had a bottle of oil. She used an equal amount of oil each day. At the end of the seventh day, she had 1170 mℓ of oil left. At the end of the tenth day, she had half of the bottle of oil left. How many litres of oil were there in the bottle at first?