Percent mixtures Quiz

Name: ______________________   Date: __________   Score: ____ / 10

10 questions. Calculator allowed. Show your working. steplyclass.com/algebra-1/percent-mixtures/quiz/

1. 1

   Mia has 6 litres of a 50% salt solution. How many litres of a 20% salt solution must she add to make a 30% salt solution?
   1. A) x = 2.4
   2. B) x = 12
   3. C) x = 120
   4. D) x = 30

2. 2

   Ana has 4 litres of a 10% sugar solution. How many litres of a 40% sugar solution must she add to make a 20% sugar solution?

   Answer: ____________________

3. 3

   A cook needs 20 litres of a 30% sugar solution. He mixes a 10% sugar solution with a 50% sugar solution. How many litres of each does he use?
   1. A) x = 20
   2. B) x = 6
   3. C) x = 0.1
   4. D) x = 10

4. 4

   Tom has 8 litres of a 70% acid solution. How many litres of a 30% acid solution must he add to make a 50% acid solution?

   Answer: ____________________

5. 5

   Sara has 5 litres of a 40% salt solution. How many litres of a 10% salt solution must she add to make a 25% salt solution?
   1. A) x = 5
   2. B) x = 200
   3. C) x = 15
   4. D) x = 75

6. 6

   Dan has 9 litres of a 20% sugar solution. How many litres of a 50% sugar solution must he add to make a 30% sugar solution?

   Answer: ____________________

7. 7

   Kim has 12 litres of a 45% acid solution. How many litres of a 15% acid solution must she add to make a 35% acid solution?
   1. A) x = 540
   2. B) x = 120
   3. C) x = 6
   4. D) x = 100

8. 8

   Raj has 2 litres of a 90% salt solution. How many litres of a 30% salt solution must he add to make a 50% salt solution?

   Answer: ____________________

9. 9

   Ella has 15 litres of an 8% sugar solution. How many litres of a 20% sugar solution must she add to make a 12% sugar solution?
   1. A) x = 60
   2. B) x = 180
   3. C) x = 120
   4. D) x = 7.5

10. 10

    Omar has 6 litres of a 75% acid solution. How many litres of a 25% acid solution must he add to make a 40% acid solution?

    Answer: ____________________