Problema Solution
A full bottle contains 80ml and 90ml of medicine.If it were used for 5ml does, there would be 3ml left in the bottle. If it were used for 3ml does, there would be 1ml left in the bottle. How much medicine is in a full bottle?
Answer provided by our tutors
we take the phrase "A full bottle contains 80ml and 90ml of medicine" to mean "A full bottle contains between 80ml and 90ml of medicine"
let 'x' represent the amount of medicine in the bottle, then we require ('%' signifies "modulo"):
x % 5 = 3
x% 3 = 1
85 + 3 = 88
80 + 3 = 83
87 + 1 = 88
84 + 1 = 85
81 + 1 = 82
the only common choice is 88ml, so the bottle contained 88ml of medicine