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Know The Answer?

The Three Switches: Solve the Brain Teaser! 

Outside a closed room are three light switches. Inside the room is one light bulb. You may enter the room only once. How do you determine which switch controls the bulb?

Turn on Switch 1 for several minutes. Turn it off and immediately turn on Switch 2.Enter the room. If the bulb is on, it's Switch 2. If it's off but warm, it's Switch 1. If it's off and cold, it's Switch 3.
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© 2026, Quincy Bioscience, LLC. | All rights reserved. Prevagen is a registered trademark and product of Quincy Bioscience, LLC.| Disclaimer: This site is for informational purposes and not medical advice.
† Based on NielsenIQ Total USxAOC, 52wk data ending 5/25/26.
* These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure or prevent any disease.