Can your computer read your mind? Let's see. Mentally select one of the following cards. Remember the card and say the name to yourself, but DO NOT say it out loud or draw attention to it. Just keep it in your mind.
Now our computer will mix up the cards and remove yours -- is it listed below:
Your card is missing, but how did the computer know which card you picked? Was that just luck? Try again to find out! Remember a card from the second group below.
Now our computer will mix up the cards and remove the one you selected from the second group below:
The one you picked is missing again. Did this computer read your mind? Can you figure this mystery out for yourself? Think about it for awhile before peeking at the explanation below.
Even Einstein didn't know everything -- so if you're having trouble understanding something on our website, or if you have a funny science joke, riddle, or brainteaser to share, let us know. But first, familiarize yourself with our Privacy Policies and other Disclaimers, which restrict our use of any information we receive from you. And be sure to ask permission from your parent or guardian! You should always get permission from your parents or guardian before providing any information through the internet or by e-mail.
[Brainteaser Index (text only)]Links Disclaimer and Caution: When you encounter the words "Non-NIEHS Link", it means that by following that link you will be leaving the NIEHS website. NIEHS is NOT responsible for non-NIEHS websites. Sites maintained by outside organizations may be changed without notice to NIEHS. Therefore, unless the link is to another U.S. government sponsored webpage, endorsement by NIEHS is not implied, and NIEHS does not guarantee their continuing safe content or privacy policies. So please ask your parent or guardian before continuing to any non-NIEHS website, and especially before providing any information via the internet or by e-mail. When last reviewed, the websites linked from the NIEHS Kids' Pages seemed suitable for you to visit, but that may have changed; if you have any difficulties or concerns with any linked materials, please let us know.
Is your card missing?Is your card missing again?
Go back and continue to see the solution.
NIEHS Kids' Pages are supported by the NIEHS Office of Communications and Public Liaison,
PO Box 12233, NH-10, Research Triangle Park, North Carolina 27709. Telephone: (919) 541-3345.
This page was last modified and reviewed for accessibility by the NIEHS Office of Management on
.
Department of Health and Human Services (DHHS), National Institutes of Health (NIH), National Institute of Environmental Health Sciences (NIEHS).
Office of Inspector General, DHHS
