Cheryl has thrice as many colored pencils as Cyrus. Madeline has 63 colored pencils and only half of what Cheryl has. How many colored pencils do the three of them have altogether? Let's think first. Chain of thought:
Cheryl has 63 x 2 = 126 colored pencils. Cyrus has 126 / 3 = 42 colored pencils. Altogether, they have 126 + 42 + 63 = 231 colored pencils.
Therefore, the answer is 231.