Problem Solving Skills for Mathcounts Competitions
Book Store => Bookstore => Twenty Mock Mathcounts Sprint Round Practices => Topic started by: yongcheng3315 on March 09, 2011, 07:15:47 PM
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Probelm # 8. For a 3-digit positive integer abc, when c = 5, we have 23 such integers that is divisible by 15; when c = 0, we have 24 of these integers. Total should be 47 instead of 27.
Problem #17. The minutes hand should be the second hand.
Thanks to gubachi for pointing this out. I agreed with gubachi.
These two mistakes were made by the original question writers. We missed them. Sorry for the inconvenience.