Katie has 13 pink marbles. She has 9 fewer orange marbles than pink marbles. She has 4 times as many purple marbles as orange marbles. How many marbles does Katie have in all? Let's think first. Chain of thought:
Find the number of orange marbles. 13 marbles - 9 marbles = 4 marbles. Find the number of purple marbles. 4 marbles x 4 = 16marbles. Find the total amount of pink, orange, and purple marbles. 13 marbles + 4 marbles + 16 marbles = 45 marbles.
Therefore, the answer is 33.