Solving Log Word Problems with Diagrams and Checks

A tree grows at a rate of 2 feet per year. If it is currently 10 feet tall, how many years will it take for the tree to reach 20 feet? Use a diagram to represent the growth over the years.

• 5 years

• 7 years

• 3 years

• 10 years

A sound level is measured in decibels (dB). If a sound is 10 dB, how many times more intense is it than a sound of 0 dB? Create a diagram to illustrate the intensity levels.

• 100 times more intense

• 20 times more intense

• 5 times more intense

• 10 times more intense

A population of bacteria doubles every hour. If you start with 100 bacteria, how many will there be after 3 hours? Draw a diagram to show the growth over time.

• 1600

• 200

• 400

• 800

A car travels at a speed of 60 miles per hour. How long will it take to travel 180 miles? Use a diagram to represent the distance covered over time.

• 4 hours

• 5 hours

• 2 hours

• 3 hours

A recipe calls for 2 cups of flour, and you want to make half the recipe. How much flour do you need? Check your solution by calculating the amount needed for the full recipe first.

• 1.5 cups of flour

• 1 cup of flour

• 2 cups of flour

• 3 cups of flour

A phone plan costs $30 per month plus $0.10 per minute. If you use 200 minutes in a month, how much will your bill be? Create a diagram to show the breakdown of costs.

• $50

• $60

• $70

• $40

A book has 300 pages. If you read 15 pages a day, how many days will it take to finish the book? Use a diagram to visualize your reading progress.

• 30 days

• 20 days

• 25 days

• 15 days

A factory produces 500 toys in 5 hours. How many toys does it produce in 1 hour? Check your solution by calculating the total production for 5 hours first.

• 200 toys

• 50 toys

• 250 toys

• 100 toys

A garden has 4 rows of plants, with 6 plants in each row. How many plants are there in total? Use a diagram to represent the rows and plants.

• 30

• 12

• 18

• 24

A movie theater has 150 seats. If 75% of the seats are filled, how many seats are empty? Check your solution by calculating the number of filled seats first.

• 60

• 38

• 25

• 45