Percent mixtures Quiz
10 questions · easy to harder · Algebra 1 · score and step-by-step answers
How it works
- 10 questions, about 20 minutes (a timer counts down; you can hide it). Solve it right here: no sign-up.
- 5 questions have choices. For the others you type the answer: a number like 4, −2, 7/2 or 3.5, or for example x = 4, x = 2 or x = −3, (3, 5), 2x + 1. Use ^ for powers (x^2) and sqrt for √. Any form with the same value counts (7/2 = 3.5).
- One question at a time: Back, Next, Mark for review and the question list at the bottom. A calculator is on the screen.
- At the end: your percent and grade, every question right or wrong, why a wrong choice is wrong, and its step-by-step solution. Then practise the lesson with new questions.
Your answers and results are kept in this browser only, so you can close the page and come back.
1 Question 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?- A) x = 2.4
- B) x = 12
- C) x = 120
- D) x = 30
2 Question 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?Type the answer.
3 Question 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?- A) x = 20
- B) x = 6
- C) x = 0.1
- D) x = 10
4 Question 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?Type the answer.
5 Question 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?- A) x = 5
- B) x = 200
- C) x = 15
- D) x = 75
6 Question 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?Type the answer.
7 Question 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?- A) x = 540
- B) x = 120
- C) x = 6
- D) x = 100
8 Question 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?Type the answer.
9 Question 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?- A) x = 60
- B) x = 180
- C) x = 120
- D) x = 7.5
10 Question 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?Type the answer.