2. QUESTION
In the simple light show pictured above, a light starts at the center (white) at time zero and moves once every second in the following pattern: from white (W) to blue (B), back to white, then to green (G), back to white, then to red (R), and back to white-in a counter-clockwise direction. If the light continues to move in this way, what will be the color sequence from the 208th second to the 209th second?
1
white to green2
white to blue3
white to red4
red to white5
green to white
방문 회차
W : 0, 2, 4, 6, 8, .. (모든 짝수)
B : 1, 7, 13, 19, ... (6으로 나눈 나머지가 1)
G : 3, 9, 15, 21, ... (6으로 나눈 나머지가 3)
R : 5, 11, 17, 23, ... (6으로 나눈 나머지가 5)
208은 짝수이므로 W
209는 6으로 나누면 나머지가 5이므로 R