(10/13/97) (Reminder to *REGISTERED* teams: You can now work with Net Team Partners (NTPs) that are not registered, just subscribed to the "mathmagic-k-3- open" list. Feel free to advertize your team name, location and e-mail, along with the geographical location of the desired partner. To do so, just send an e-mail to mathmagic-k-3@mathforum.org. PLEASE remember this only works if you have paid and been included in one of the WELCOMES regularly posted.) ************************************* MathMagic Cycle 25: Level K-3 Regular ************************************* Feet and heads at the Zoo The El Paso Zoo is one of the many nice attractions that this city in west Texas has. Since I don't have time to play tourist, every time someone from out of town comes to visit and brings their kids, I happily take them to the zoo (I sometimes think I have more fun than they do!) Recently I was "dragging" this young friend from cage to cage, and he was getting tired. At one point he told me "Hey - I just counted 36 feet" - We were looking at an enclosure that has zebras and ostriches together, so, instead of taking the hint, I took a minute and counted 13 heads. We took a short break to figure out how many of each animal there were, and we guessed right! Can you and your NTP figure out a way of coming up with the answer? ************************************** MathMagic Cycle 25: Level K-3 Advanced ************************************** vertex -> C A triangular pencil holder is marked as shown. When it is "rolled" / \ once to the right, A becomes the vertex and B-C the base. Use a A - B table like the one shown, and try to discover patterns to determine -------which letter will be the vertex after 10, 17, 23 and 30 rolls. Table: # rolls | vertex | base (HINT: You may need to look at -------+--------+------- a multiplication table for 3) 0 | C | A-B 1 | A | B-C ... | ... | ... Remember to write down your steps and conclusions. ========= Good luck MrH