Question
PSLE
Vanessa had a bottle of washing liquid. She used an equal amount of washing liquid each day. At the end of the 12th day, 13 of the bottle was left. At the end of the 14th day, the amount of washing liquid left was 900 mℓ. What was the amount of washing liquid in the bottle at first? Express your answer in mℓ.
2 m

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PSLE
Vanessa had a bottle of washing liquid. She used an equal amount of washing liquid each day. At the end of the 12th day, 13 of the bottle was left. At the end of the 14th day, the amount of washing liquid left was 900 mℓ. What was the amount of washing liquid in the bottle at first? Express your answer in mℓ.