Finding Constants: Real-World Math Challenges for 7th Graders

1. Sarah has a savings account where she deposits a constant amount of $50 each month. If she starts with $200, how much money will she have after 6 months?

• 350

• 500

• 600

• 450

2. A car rental company charges a flat fee of $30 plus $0.20 per mile driven. If a customer drives 150 miles, what is the total cost of the rental?

• $60

• $100

• $50

• $75

3. A recipe calls for a constant amount of 2 cups of sugar for every 5 batches of cookies. How much sugar is needed for 15 batches?

• 8 cups

• 10 cups

• 4 cups

• 6 cups

4. A gym charges a monthly fee of $40 plus a one-time registration fee of $25. If a new member pays for 3 months, what is the total amount paid?

• $100

• $160

• $120

• 145

5. A gardener plants a constant number of 8 trees each week. If he plants trees for 4 weeks, how many trees does he plant in total?

• 24

• 40

• 16

• 32

6. A phone plan costs $25 per month plus $0.10 for each text message sent. If a user sends 200 text messages in a month, what is the total cost?

• $50

• $30

• $45

• $35

7. A bookstore sells notebooks for $3 each and has a constant stock of 120 notebooks. If they sell 45 notebooks, how many are left in stock?

• 90

• 60

• 100

• 75

8. A factory produces a constant number of 500 toys each day. How many toys will it produce in 10 days?

• 2500 toys

• 4000 toys

• 5000 toys

• 6000 toys

9. A taxi charges a base fare of $2.50 plus $1.50 for each mile driven. If a passenger travels 10 miles, what is the total fare?

• $20.00

• $12.50

• $17.50

• $15.00

10. A school has a constant number of 25 students in each class. If there are 4 classes, how many students are there in total?

• 100

• 125

• 50

• 75