Question

The instructions for a cough syrup are to give 2 teaspoons (tsp) every 8 hours. the cough syrup is supplied in 150-ml bottles. how many bottles must be purchased to treat 3 children for 5 days

Answer 1

2*3 = 6 teaspoons per day per child
6*5 = 30 teaspoons 
30*3 = 90 teaspoons 
You need 90 teaspoons

1 teaspoon = 4.9289 mL
90*4.9289 = 443.6010 mL
443.6010 / 150 = 2.9573 bottles

You need at least 3 bottles