6. External Transfer With Unchanged Difference Concept
Mr Tan is 4 times as old as his daughter, Chloe. 2 years ago, the ratio of Mr Tan's age to Chloe's age was 10:1. What is Chloe's present age?
Mr Tan is 4 times as old as his daughter, Chloe. 2 years ago, the ratio of Mr Tan's age to Chloe's age was 10:1. What is Chloe's present age?
7. External Transfer With Changed Quantities Concept
Johnny had 40% as many marbles as Tommy at first. Johnny gave 8 marbles away and Tommy gave 40 marbles away. Then Johnny had 50% as many marbles as Tommy. How many marbles was Tommy left with?
Johnny had 40% as many marbles as Tommy at first. Johnny gave 8 marbles away and Tommy gave 40 marbles away. Then Johnny had 50% as many marbles as Tommy. How many marbles was Tommy left with?
8. Proportions Concept (Number x Value)
The ratio of the number of chicken pies to apple pies in a store was 5:1. All the pies were sold and $204 was collected from the sale. If each chicken pie was sold for $3 and each apple pie was sold for $2, how many chicken pies were there?
The ratio of the number of chicken pies to apple pies in a store was 5:1. All the pies were sold and $204 was collected from the sale. If each chicken pie was sold for $3 and each apple pie was sold for $2, how many chicken pies were there?
9. Simultaneous Concept
A florist had 100 roses and orchids in her shop. After selling 75% of the roses and 50% of the orchids to a customer, she was left with 38 flowers. How many roses did she have at first?
A florist had 100 roses and orchids in her shop. After selling 75% of the roses and 50% of the orchids to a customer, she was left with 38 flowers. How many roses did she have at first?
10. Gaps and Difference Concept
If Andy buys 3 plates and 5 cups, he will have $6 left. If he buys 5 plates and 3 cups, he will need another $4. Given that a cup costs $1.50, how much does a plate cost?
If Andy buys 3 plates and 5 cups, he will have $6 left. If he buys 5 plates and 3 cups, he will need another $4. Given that a cup costs $1.50, how much does a plate cost?