Question: Three times the sum of marbles that Atticus, Jensen, and Cruz have is equal to 60. If Atticus has half as many marbles as Jensen, and Atticus has 4 marbles, how many marbles does Cruz have?
Answer with step-by-step thinking: Three times the sum of marbles that Atticus, Jensen, and Cruz have is equal to 60, meaning together they have 60 / 3 = 20 marbles. If Atticus has half as many marbles as Jensen, and Atticus has four marbles, Jensen has 2 * 4 = 8 marbles. Together, Atticus and Jensen have 8 + 4 = 12 marbles. Since the sum of marbles that Atticus, Jensen, and Cruz have is equal to 20, and Atticus and Jensen have 12 marbles, Cruz has 20 - 12 = 8 marbles.
So the answer is 8.

Question: In Henry's collection of music CDs, he has 3 more country CDs than rock CDs but twice as many rock CDs as classical CDs. If he has 23 country CDs, how many classical CDs make up his collection?
Answer with step-by-step thinking: Henry has 23 - 3 = 20 rock CDs. Henry has 20 / 2 = 10 classical CDs.
So the answer is 10.

Question: Lara is baking cookies using four baking trays. She places five rows of cookies on a baking tray where there are six cookies in one row. How many cookies is she baking?
Answer with step-by-step thinking:
Lara can bake 5 x 6 = 30 cookies in one tray. So, Lara is baking a total of 30 x 4 = 120 cookies.
So the answer is 120.