1. Leon needs 100ml of water for every 100g of mix.

He is using 3 times the amount of mix (300g) so he will need 3 times the amount of water (30ml x 3 = 90ml)

Answer: Leon needs to add 90ml of water.

2. Jacob has 3 boxes of bananas with a total of 3 boxes x 60 bananas/box = 180 bananas.

He gave out 28 bananas so he has 180 bananas - 28 bananas = 152 bananas left.

Answer: Jacob has 152 bananas left.

3. Each person spends 75c/ride x 3 rides = 225c

Together they spend 225c/person x 2 people = 450c

Answer: They spend a total of 450c

4. There are 100 cents in $1��$5 is equal to 5 x 100c = 500c

At 17c per pineapple, you can buy 500c : 17c/pineapple = 29 pineapples

Answer: You can buy 29 pineapples.

5. The total cost for the children is 20 children x 50c/child = 1000c

There are 100 cents in $1��$1.20 is equal to 120c

The total cost for the adults is 5 adults x 120c/adult = 600c

The total cost is 1000c + 600c = 1600c

Answer: The total cost is 1600c

6. There were 16 white cars : 2 = 8 blue cars

There were 8 blue cars x 3 = 24 black cars

Answer: There were 24 black cars that went past.