Mrs. Dee Vision formed three problem-solving teams in her class. Each team was asked to bring three colored markers, four times the number of pencils as markers, and twice the number of sheets of graph paper as pencils. How many sheets of graph paper did the class bring altogether?

There's a frog jumping contest in Hippity Hop County. Leaping Larry jumps 18 cm every 6 seconds. Bouncing Billy jumps 7 cm every 3 seconds. What is the difference in the distance they jumped at the end of one minute?

One nickel weighs 4 grams. How much does $7.15 in nickels weigh?

Steve had $2.50 in dimes in the pocket of his jacket. After walking for a half hour, he discovered he had a small hole in his pocket. Two dimes dropped through that small hole every 5 minutes. How much money did Steve have then?

The students and teachers of the Learn-a-Lot School chartered 2 buses for a field trip. Each bus had 18 rows of seats with room for 4 people in each row. 135 students and adults are going on the field trip. How many seats will be empty?