Official Rules:

Yahoo! 15th Birthday Trivia Challenge

THE FOLLOWING PROMOTION IS INTENDED FOR PLAY IN THE FIFTY UNITED STATES, THE DISTRICT OF COLUMBIA, AND CANADA (EXCLUDING THE PROVINCE OF QUEBEC) ONLY (COLLECTIVELY, THE "ELIGIBILITY AREA") AND SHALL ONLY BE CONSTRUED AND EVALUATED ACCORDING TO UNITED STATES LAW.  DO NOT ENTER THIS PROMOTION IF YOU ARE NOT LOCATED IN, AND A LEGAL RESIDENT OF, THE ELIGIBILITY AREA.

NO PURCHASE IS NECESSARY TO ENTER OR WIN.  A PURCHASE DOES NOT IMPROVE YOUR CHANCE OF WINNING.

ENTRY IN THIS PROMOTION CONSTITUTES YOUR ACCEPTANCE OF THESE OFFICIAL RULES.

1. Eligibility: You must be a legal resident of the Eligibility Area and 18 years or older at the time of entry.  Void in overseas U.S. & Canadian territories, possessions, commonwealths and military installations, and where prohibited by law. Employees and agents of Yahoo!, (“Sponsor”), its affiliates, subsidiaries, advertising and promotional agencies, any other prize sponsor, and any entity involved in the development, production, implementation, administration or fulfillment of the Promotion (all of the foregoing, together with Yahoo!, collectively referred to as “Promotion Entities”), and the immediate family members and persons living in the same household as such individuals, whether related or not, are not eligible to participate or win. Twitter, Inc. (“Twitter”) is not a sponsor of, nor is in any way affiliated with, this Promotion.
2. How To Enter: The Promotion begins at 8:00:00 AM PST on March 2, 2010 and ends at 7:59:59 AM PST on March 4, 2010 (the “Promotion Period”).  A Twitter account is required to participate in this Promotion.  If you are not an existing Twitter account holder, visit twitter.com and follow the instructions to create a free Twitter account (your “Twitter Account”).  Once logged into Twitter, set your Twitter account to “follow” the Twitter handle associated with the Promotion, @yahoo (the “Promotion Twitter Address”).  Then, beginning at the start of the Promotion Period, look for a series of fifteen periodic Twitter updates from @yahoo (each, a “Tweet”) that each contain a trivia question about Yahoo! (a “Trivia Question”).  Each such Tweet will be in the format of “Qx: [text of Trivia Question]”, where “x” is the number of the Trivia Question being asked.  For each Trivia Question, you may receive an entry in this Promotion (an “Entry”) by replying to the Tweet containing the Trivia Question from your Twitter Account with your answer (your “Reply”).  Each Reply must be in the format of “Ax [your answer to Trivia Question]”, where “x” is the number of the Trivia Question you are answering.  Your answer need not be correct to receive an Entry; however, replies that do not follow the above format may be discarded or ignored.  You may receive up to 15 entries in this Promotion (each, an “Entry”), one for each Reply you submit during the Promotion Period.For purposes of these Official Rules, “receipt” of an Entry occurs when Yahoo! receives your Entry as properly submitted by you in accordance with the instructions above.  In the event of a dispute regarding the identity of the holder of a Twitter account or handle, the dispute will be resolved in favor of the individual who is the "authorized email account holder" of the “alternate email address” provided when the Twitter account was created.  "Authorized email account holder" is defined as the natural person assigned an email address by an internet access provider, online service provider, or other organization (i.e., business, educational institution) responsible for assigning email addresses for the domain associated with the submitted email address.  If Yahoo! is unable to verify the authorized account holder of a potentially winning Twitter account, that account will be disqualified and an alternate winner selected.  Potential prize winners may be required to provide Promotion Entities with proof that he/she is the authorized account holder as described above.LIMIT ONE ENTRY PER PERSON, PER EMAIL ADDRESS AND/OR PER TWITTER ID FOR EACH TRIVIA QUESTION, FOR A TOTAL OF FIFTEEN POSSIBLE ENTRIES PER PERSON, PER EMAIL ADDRESS AND/OR PER TWITTER ID IN THIS PROMOTION.  Although subsequent attempts to enter may be received, only the first Entry received from a particular individual in connection with a particular Trivia Question will count; subsequent attempts to submit Entries for that Trivia Question will be disqualified.  The submission of an Entry is solely the responsibility of the entrant.  Entries may only be made according to the method described above.  Proof of sending (such as an automated computer receipt, "thanks for entering" message, or post office receipt) does not constitute proof of actual receipt by Yahoo! of an entry for purposes of these Official Rules.  Automated entries (including but not limited to entries submitted using any bot, script, macro, or sweepstakes service), copies, third party entries, facsimiles and/or mechanical reproductions are not permitted and will be disqualified.  Only eligible entries actually received by Yahoo! before the end of the Promotion Period will be included in the prize drawing.  Unintelligible, incomplete, or garbled entries will be disqualified.  All entries become the property of Yahoo!, and none will be acknowledged or returned.
3. Conduct: By entering the Promotion, entrants agree to comply with and be bound by these Official Rules.  The Official Rules will be posted at http://www.ycorpblog.com/ (the “Promotion Website”) throughout the Promotion.  Failure to comply with these Official Rules may result in disqualification from the Promotion.  Entrants further agree to comply with and be bound by the decisions of the judges, which will be final and binding in all respects.  Yahoo! reserves the right at its sole discretion to disqualify any individual it finds to be: (a) tampering or attempting to tamper with the entry process or the operation of the Promotion or any Yahoo! or Promotion-related website; (b) violating the Official Rules; (c) violating the terms of service, conditions of use and/or general rules or guidelines of any Yahoo! or Promotion related property or service; or (d) acting in an unsportsmanlike or disruptive manner, or with intent to annoy, abuse, threaten or harass any other person. CAUTION: ANY ATTEMPT BY AN ENTRANT OR ANY OTHER INDIVIDUAL TO DELIBERATELY DAMAGE ANY WEBSITE OR UNDERMINE THE LEGITIMATE OPERATION OF THE PROMOTION MAY BE A VIOLATION OF CRIMINAL AND CIVIL LAWS.  SHOULD SUCH AN ATTEMPT BE MADE, YAHOO! RESERVES THE RIGHT TO SEEK DAMAGES FROM ANY SUCH PERSON TO THE FULLEST EXTENT PERMITTED BY LAW.
4. Prize: Grand Prize: One Grand Prize winner will receive a Nikon Cool Pix S230 Yahoo! Camera and a Jawbone Earcandy Bluetooth headset.  Approximate Retail Value of Grand Prize: $305.
   First Prizes: Four First Prize winners will each receive a Mimobot Yahoo! USB flash drive.  Approximate Retail Value of each First Prize: $21.

The following applies to all prizes: Approximate retail value of all Prizes: $389.  Prizes cannot be used in conjunction with any other promotion or offer. Prizes may not be transferred or assigned except by Sponsor.  Only listed Prizes will be awarded and no substitutions, cash equivalents or redemptions will be made, except that Sponsor reserves the right to substitute any Prize with another Prize of equal or greater value in the event that an advertised Prize (or any component thereof) is not available.  Expenses not specifically stated above, together with the reporting and payment of all applicable taxes, fees, and/or surcharges, if any, arising out of, or resulting from, acceptance or use of a prize, are the sole responsibility of the winner of that prize.  Yahoo! expressly disclaims any responsibility or liability for injury or loss to any person or property relating to the delivery and/or subsequent use of the prize awarded.  Yahoo! makes no representations or warranties concerning the appearance, safety, or performance of any prize awarded.  Restrictions, conditions, and limitations apply.  Promotion Entities will not replace any lost or stolen prize items.

1. Winner Selection and Notification: Potential winners will be selected in a random drawing to be held on or about March 5, 2010 from among all eligible entries received.  Odds of winning depend on the number of eligible entries received.  All prize drawings will be conducted by a representative of the Sponsor, whose decisions are final.Potential winners will be notified within 48 hours following winner selection. Prize notifications will be delivered by a Twitter update from Yahoo!.  Return of any prize/prize notification as undeliverable, or inability of Promotion Entities to contact a potential winner within 48 hours following attempted notification may result in disqualification and selection of an alternate winner by random drawing.  If a winner is a Canadian resident, he/she will be required to answer  a timed skill testing question to be administered by telephone or mail before he/she may be confirmed as a prize winner.  Any difference between actual value of a prize and the approximated value of a prize as stated in these Official Rules will not be awarded.

1. General Conditions: This Promotion is governed by the laws of the United States. All federal, state and local laws and regulations apply.By entering, participants: (a) release and hold harmless Promotion Entities, and their respective parents, subsidiaries, affiliates, directors, officers, employees, and agents from any and all liability for any injuries, loss or damage of any kind to persons, including death, or property damage resulting in whole or in part, directly or indirectly, from acceptance, possession, misuse or use of any prize, participation in this promotion, or while traveling to, preparing for, or participating in any prize-related activity, and (b) grant to Yahoo! the right to use and publish their proper name and state online and in print, or any other media, in connection with the Promotion.Except where prohibited by law, a winner’s acceptance of a prize constitutes permission for Promotion Entities to use such winner’s name, address (city and state only), statements, photograph, voice and/or likeness for any advertising and promotional purposes relating to the Promotion without further compensation, consideration, review or consent.

1. Limitations of Liability: Promotion Entities assume no responsibility for lost, late, misdirected, garbled or unintelligible entries or Tweets, or for theft, destruction or unauthorized access to, or alteration of, entries.  Promotion Entities are not responsible for any incorrect or inaccurate information, whether caused by website users, any of the equipment or programming associated with or utilized in the Promotion, or any technical or human error which may occur in the processing of submissions in the Promotion.  Promotion Entities assume no responsibility for any error, omission, interruption, deletion, defect, delay in operation or transmission, failures or technical malfunction of any telephone network or lines, computer online systems, servers, providers, computer equipment, software, email, players or browsers, whether on account of technical problems, traffic congestion on the Internet or at any website, or on account of any combination of the foregoing.  Promotion Entities are not responsible for any injury or damage to participants or to any computer related to or resulting from participating or downloading materials in this Promotion.  If, for any reason, the Promotion is not capable of running as planned, including infection by computer virus, bugs, tampering, unauthorized intervention, fraud, technical failures, or any other causes beyond the control of Promotion Entities which corrupt or affect the administration, security, fairness, integrity or proper conduct of this Promotion, Yahoo! reserves the right at its sole discretion to cancel, terminate, modify or suspend the Promotion and select winners from among all eligible entries received prior to the cancellation.
2. Privacy: By entering the Promotion, you agree to Yahoo!’s use of your personal information as described in Yahoo!’s Privacy Policy, located at http://info.yahoo.com/privacy/us/yahoo/promotions/details.html.
3. Winners List: The names of the prize winners may be obtained after March 5, 2010 and no later than June 5, 2010 by sending a self-addressed stamped envelope to: Yahoo! 15th Birthday Trivia Challenge Winners List Requests, Yahoo! Inc., Attn: Lucas Mast, 701 First Avenue, Sunnyvale, CA 94089.

1. Official Rules: For a copy of the Official Rules, print this web page or send a self-addressed, stamped envelope to: Yahoo! 15th Birthday Trivia Challenge, Official Rules Requests, Yahoo! Inc., Attn: Lucas Mast, 701 First Avenue, Sunnyvale, CA 94089. Vermont residents may omit return postage. Requests received after the close of the Promotion Period will not be honored.

1. Sponsor: Yahoo! Inc., 701 First Avenue, Sunnyvale, CA 94089.