Q: Hanna has $300. She wants to buy roses at $2 each and give some of the roses to her friends, Jenna and Imma. Jenna will receive 1/3 of the roses, and Imma will receive 1/2 of the roses. How many roses does Hanna give to her friends?
A: Hanna can buy $300 / $2 = 150 roses. So, Jenna will receive 1 / 3 x 150 = 50 roses. While Imma will receive 1 / 2 x 150 = 75 roses. Therefore, Hanna gives a total of 50 + 75 = 125 roses to her friends. The answer is 125.

Q: John buys 10 packs of magic cards. Each pack has 20 cards and 1/4 of those cards are uncommon. How many uncommon cards did he get?
A: Each pack has 20 / 4 = 5 uncommons. So he got 10 * 5 = 50 uncommons. The answer is 50.

Q: On Monday, Matt worked for 450 minutes in his office. On Tuesday, he worked half the number of minutes he worked on Monday. On Wednesday, he worked for 300 minutes. How many more minutes did he work on Wednesday than on Tuesday.
A:
On Tuesday Matt worked 450 minutes / 2 = 225 minutes. On Wednesday Matt worked 300 minutes - 225 minutes = 75 minutes more. The answer is 75.