Alex, Brad, Calvin, and Dennis are playing checkers. Each of the 4 boys played 2 games with every other player. How many games of checkers were played altogether?

A box of apples was delivered to Paul's Pies and Cakes. He put half of the apples aside for a pie he would make later. He put 25 of the remaining apples in the refrigerator. That left 6 apples to use in his muffins. How many apples were in the box at first?

Megan and her sister, Tara, wanted to buy a scooter for $26. Tara had $4 more than Megan. Together they had enough money to buy the scooter. How much money did Tara have?

Evan delivers packages in a building. He started on the first floor and went up 7 floors. He went down 3 floors and then up 16 floors. Then he was only 2 floors away from the top of the building. How many floors are in the building altogether?

Jake bought a book of tickets for the rides at Fun Land. 8 of the tickets were red. There were twice as many blue tickets as red tickets. Jake used all 6 of his yellow tickets first. How many tickets did Jake buy in all?