### Instruction: A total of 180 marbles (gray, white, and black) are placed in a line. The first five are gray, followed by four white, followed by three black, followed by five gray, followed by four white, followed by three black,.... If this pattern continues, what is the color of the 158th marble in this line?### Response: So the pattern is 5 gray, 4 white, 3 black, 5 gray, 4 white, 3 black...
That means the pattern repeats every 12 marbles.
So we can find the remainder when 158 is divided by 12.
158 / 12 = 13 remainder 2.
So the 158th marble will be the same color as the 2nd marble.
The 2nd marble is gray.