Question:

Samantha, Reema and Payal went late at night to visit an adventure place called The Mystery Spot. The place has a strange window-less room with white walls. One of the walls has a blue triangle and a red circle painted on it. The girls entered the room in turns. First, Samantha entered the room and came out telling that there were two shapes painted on the wall—one triangle and one circle. Then, Reema entered the same room and came out surprised as she saw only a triangle on the wall. Lastly, Payal entered the room and claimed that she saw only a circle on the wall. Which of the four statements is correct?

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In rooms with changing lighting, different colors of light can reveal or hide certain shapes and patterns. Pay attention to how the lighting affects visibility.
Updated On: Jan 22, 2026
  • When Samantha entered, the room was lit by a blue light. When Reema entered the room, the light was changed to white light and when Payal entered the room, the light was changed to red.
  • When Samantha entered, the room was lit by a white light. When Reema entered the room, the light was changed to blue light and when Payal entered the room, the light was changed to red.
  • When Samantha entered, the room was lit by a white light. When Reema entered the room, the light was changed to red light and when Payal entered the room, the light was changed to blue.
  • When Samantha entered, the room was lit by a blue light. When Reema entered the room, the light was changed to red light and when Payal entered the room, the light was changed to white.
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The Correct Option is C

Solution and Explanation

Step 1: Analyzing the sequence of events.
The girls entered the room in turns, and each girl observed different shapes on the wall. Samantha saw both the triangle and the circle, while Reema saw only the triangle, and Payal saw only the circle. This implies that the shapes on the wall are changing based on the lighting conditions in the room.
Step 2: Understanding the light conditions.
- When Samantha entered, the room was lit by a white light, revealing both the triangle and the circle. - When Reema entered, the light changed to red, and only the triangle was visible. - When Payal entered, the light changed to blue, and only the circle was visible.
Step 3: Conclusion.
The correct answer is (C) because the lighting sequence explains the changes in the shapes observed by the girls.
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