Coin problems 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
A jar has 5-cent coins and 10-cent coins. There are 9 more 5-cent coins than 10-cent coins. The coins are worth $2.25. How many of each coin are in the jar?- A) x = 12
- B) x = 9
- C) x = 180
- D) x = 225
2 Question 2
Omar has 5-cent coins and 25-cent coins. He has 6 more 5-cent coins than 25-cent coins. The coins are worth $1.50. How many of each coin does he have?Type the answer.
3 Question 3
Mia has 20 coins. Some are 5-cent coins and the rest are 10-cent coins. The coins are worth $1.40. How many of each coin does she have?- A) x = 8
- B) x = 10
- C) x = 40
- D) x = 140
4 Question 4
Lina has 30 coins. Some are 10-cent coins and the rest are 25-cent coins. The coins are worth $4.80. How many of each coin does she have?Type the answer.
5 Question 5
A jar has 10-cent coins and 25-cent coins. There are twice as many 10-cent coins as 25-cent coins. The coins are worth $3.60. How many of each coin are in the jar?- A) x = 8
- B) x = 3.60
- C) x = 80
- D) x = 360
6 Question 6
A box has 25-cent coins and 50-cent coins. There are 2 fewer 50-cent coins than 25-cent coins. The coins are worth $4.25. How many of each coin are in the box?Type the answer.
7 Question 7
A jar has 50 coins. Some are 10-cent coins and the rest are 5-cent coins. The coins are worth $3.70. How many of each coin are in the jar?- A) x = 240
- B) x = 24
- C) x = 370
- D) x = 120
8 Question 8
A box has 10-cent coins and 25-cent coins. There are 5 fewer 25-cent coins than 10-cent coins. The coins are worth $2.95. How many of each coin are in the box?Type the answer.
9 Question 9
Ali has 36 coins. Some are 10-cent coins and the rest are 50-cent coins. The coins are worth $8.00. How many of each coin does he have?- A) x = 11
- B) x = 8
- C) x = 440
- D) x = 800
10 Question 10
Kai has 24 coins. Some are 20-cent coins and the rest are 50-cent coins. The coins are worth $7.80. How many of each coin does he have?Type the answer.