Answers to the Puzzlers in Arithmetic Made Familiar and Easy

And now, the solutions for the puzzlers from

Arithmetic Made Familiar and Easy

Puzzler 1 asked you to figure out the ages of girl and older man at the time of their wedding.  The answer is that she was 15 and he was 45 years old.  Here’s how the author of Arithmetic Made Familiar and Easy explains how to get the answer.

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Puzzler 2 asked you to calculate how many geese the pretty maid was herding.  Here’s how to get the answer of 99 feathered friends…

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Thanks for playing  “Stump the Chump”  with Cotsen…

Teaching Arithmetic Using a Wall Chart with Moveable Illustrations

Here’s a new acquisition for anyone interested in the history of math education, graphic design, or the use of wall charts in the classroom.   It’s a very large poster with various moveable illustrations for teaching elementary arithmetic that was published in the Soviet Union sometime during the 1930s.

Arifmetika measures 67 x 103 centimeters and is backed with linen to make it sturdier (in the corners there are two large grommets for hanging it on a wall).   It was to be used during quarters 1 and 2 in second grade when the fundamentals of addition, subtraction, and multiplication were taught.   There is a partly legible stamp on the back, that could be a property stamp from a school in one of the former Central Asian republics.Cotsen_Arithmetika_Poster

Cotsen_Arithmetika_Poster

Below is a detail of the chart’s upper right hand corner.  You can make out the little booklet mounted landscape wise that contains the multiplication tables for 4, 5, 6, 7, and 8.

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Cotsen_Arithmetika_Poster_4thAbove is the lower right hand corner, with the rest of the credits running above the lower edge.  Arifmetika‘s illustrations are credited to A. I. Saychuk and the press run was 2000 copies.   Many thanks to Thomas Keenan, Firestone Library’s Slavic Bibliographer extraordinaire, for help translating the hard bits  (Pikov Andropov wasn’t delivering any public figures to campus this week or we would have flagged him down in the Firestone turn-out).