Tripling Growth: Real-World Challenges in 7th Grade Math

A bacteria culture triples in size every hour. If you start with 5 bacteria, how many will there be after 4 hours?

• 15

• 405

• 125

• 1000

A tree grows in height by tripling its size every year. If the tree is 2 meters tall now, how tall will it be after 3 years?

• 18 meters

• 36 meters

• 54 meters

• 6 meters

A certain investment triples in value every 5 years. If you invest $200, how much will it be worth after 15 years?

• 1800

• 6000

• 3000

• 5400

A population of rabbits triples every month. If there are 10 rabbits now, how many will there be in 6 months?

• 5000

• 1000

• 7290

• 15000

A viral video on social media triples its views every day. If it starts with 100 views, how many views will it have after 5 days?

• 1000

• 50000

• 15000

• 24300

A certain species of fish triples its population every 2 years. If there are currently 50 fish, how many will there be after 6 years?

• 1350

• 600

• 1200

• 900

A savings account triples its balance every 10 years. If you have $300 in the account now, how much will you have after 30 years?

• 600

• 9000

• 8100

• 2700

A certain type of plant triples its number of leaves every month. If it has 4 leaves now, how many leaves will it have after 4 months?

• 12 leaves

• 64 leaves

• 324 leaves

• 128 leaves

A smartphone app's downloads triple every week. If it has 1,000 downloads now, how many downloads will it have in 3 weeks?

• 27000

• 15000

• 1000

• 8000

A video game character's power triples every level. If the character starts with a power level of 10, what will the power level be after reaching level 4?

• 100

• 243

• 30

• 810