Off on a Tangent 
A Fortnightly Electronic
Newsletter from the Hope College Department of Mathematics 
February 16, 2018  Vol. 16, No. 10

http://www.math.hope.edu/newsletter.html 
Colloquium: Keno and Lotteries 
Title: Follow The Bouncing Ball: Keno and Lotteries  
Speaker: Mark Bollman, Albion
College 

Time: Tuesday, February 20 at
4:00 pm 

Place: VanderWerf 102 
Upcoming Colloquia 

The following colloquia are on
the
schedule
for this semester. Additional ones may be added later.

Mosaic
Lecture at Grand Valley 

Each
year, GVSU's Mathematics Department hosts a lecture, called the Mosaic
Lecture, to celebrate diversity in the mathematical sciences. This
year's lecture will take place on Tuesday, February 27, at 7:30 p.m.
Their speaker is Dr. Deanna Haunsperger, President of the Mathematical
Association of America and Professor of Mathematics at Carleton
College. Her talk is entitled Making Connections: Lessons Learned from
Women Mathematicians More information can be found here. 
Fueling
for a successful math class 

How
do you fuel for your math classes so you can learn like a champion? A
heaping helping of some Eggs VanKletz? Last night's pizza? Starbucks?
Monster Energy? How about your professors, how do they fuel so they can teach like champions? I'm not sure what prefueling Prof. Mark Pearson did this morning, but the picture shown is what he was bringing to his Multi 1 class at 9:30 am. He has a coffee for that burst of energy needed to power through a particularly long problem. The apple, I assume, is to keep the doctor away during this difficult flu season. And the rotten banana... I had to do a web search for this one. Maria's Farm Country Kitchen came to the rescue with a list of ten things to do with rotten bananas. #1 Banana muffinsI doubt it. #5 A banana smoothieI don't think so. #7 Bananas Fosternot on campus. #9 Feed it to birds, butterflies or babieshmm, maybe that's it. 
Problem
Solvers of the Fortnight 
"Valentine's Day is coming up soon," thought Mrs. Hartsema. "I should get a little something for my grandchildren." She decided to give each of her 31 grandchildren a number of candy hearts along with their Valentines. After counting her candy hearts and finding 470 of them, Mrs. Hartsema figured that each girl would get 7 more candy hearts than each boy. She gave 74 candy hearts to the children of her eldest son Art. How many girls did Art have? Congratulations to the following correct problem solvers: Thomas Diaz, Forest Rulison, Jincheng Yang, Will Zywicki, Zheng Qu, Grace Ahlgrim, Josiah Brouwer, and Philip LaPorte 
Problem
of the Fortnight 
Four circles are tangent to each other and tangent to two nonparallel lines, as shown in the figure. The radius of the smallest circle is 4 and the radius of the largest circle is 9. Find the radii of the other two circles. Write your solution (showing all relevant work) on the back of a circle of radius nine and submit it to the Problem of the Fortnight slot outside Professor Mark Pearson's office (VWF 212) by 3:00 p.m. on Friday, February 23. As always, be sure to include your name and the name(s) of your math professor(s)  e.g. Tan Gent, Professor Ray D.I.  on your solution. 
Off
on a Tangent 