Question
PSLE
There are 30 biscuits in a box. 9 of them are salted caramel biscuits while the rest are mango ones. What is the ratio of the number of mango biscuits to that of salted caramel biscuits in the box?
1 m

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PSLE
There are 30 biscuits in a box. 9 of them are salted caramel biscuits while the rest are mango ones. What is the ratio of the number of mango biscuits to that of salted caramel biscuits in the box?