2/3 of my students play the piano. 1/2 of the students who play the piano also play the vioilin. 1/4 of those students also play the flute. What fraction of my students play all three instruments?

A wading pool is half filled with water. When 12 more gallons of water are added, the pool is 7/8 full. How many gallons of water can the wading pool hold?

On a shopping trip, Henry spends 1/3 of his money at the Sport Court. He then spends 1/3 of the money he has left at June's Tunes. Finally, he spends his remaining $20 at Troy's Toys. How many dollars did Henry have at first?

There are 36 students in Mr. Al Gebra's math class. 5/6 of the students passed the test. The same number of boys and girls failed the test. 4/9 of the students are girls. How many boys passed the test?

Amy sold 3/4 of her comic books for 80 cents each. She had 5 comic books left. How much money did Amy collect?