There were some green and blue pens in a box. If 27 green pens were taken out of the box, there would be 1/3 as many blue pens as green pens. If 40 blue pens were added into the box, there would be 1/2 as many blue as green pens. How many pens were there in the box?

The local high school had 1,000 bottles of water on hand. The school issued 1/4 of  the supply to the 9th grade, 1/5 of the supply to the 10th grade, and 2/5 of the supply to the 11th grade. How many bottles remained for the 12th grade?

Cylie Myrus received 300 CD's from her good friend Swaylor Tift.  Cylie then doubled the CD collection every year for 4 years.  How many CDs did Cylie  have after four years?

If a box of 100 gloves cost $7.73, how much does each glove cost?

How much of an alloy that is 40% copper should be mixed with 600 ounces of an alloy that is 90% copper in order to get an alloy that is 50% copper?

Tyrell wants to buy bagels ans cream cheese for his 16 coworkers. He expects that each worker will eat 1 1/2 bagels and 2 servings of cream cheese. The cream cheese comes in 4 serving containers. How many bagels and containers of cream cheese will he need?

A bakery sells 79 1/4 pounds of baked goods each day. If they triple their sales the next day, how many pounds would they sell?

a small soda had 320 ml a large soda has 533.3 ml If alex drinks 3/4 of a small soda and beckie drinks 2/3 of a large soda, who drinks the most? How much more?

A metallurgist has one alloy containing 40 % aluminum and another containing 66 % aluminum. How many pounds of each alloy must he use to make 55 pounds of a third alloy containing 46 % aluminum? (Round off the answers to the nearest hundredth.)

Meredith works at a blood bank. She needs to write a report of the ratio of type- a blood donated to tpye-o blood donated, but she lost this month's logs that had the quantities. She knows that last month 25 pints of tpye-a blood were donated and 42 pints of tpye-o blood were donated. She remebers that this month 55 pints of tpye-a blood were donated. if the ratio held true for this month, how can Meredith determine the amount of tpye-o blood donated