LOGICVILLE

Mathematical Puzzles

Dual Cryptograms

Cryptarithms
Anagrams Cryptograms Doublets
Logic Puzzles Magic Word Squares Sudoku
Chess Fractal Puzzles Tangrams

 

 

 

Intellectual Puzzles
Bookstore
List of Puzzles
Analytical Puzzles
Christmas Puzzles
New Year's Puzzles
Fractal Puzzles
Easter Puzzles
Nature Fractals
Encrypted Quotations
Fractal Images
Baseball Puzzles
Daily Fractal Puzzle
Math Recreations
Algebra Placement
Cryptogram Challenge
Sudoku
Tangrams
Tangram Stories
Puzzle Categories
Thanksgiving Quotes
Christmas Quotes
Christmas Logic
New Year Resolutions
Solutions
Advertise With Us

 

 

List of Puzzles

List of Solutions

Solution to Puzzle 73.  SEVEN CIRCLES

The formula for the circumference of a circle is &pi * D, where D is the diameter of the circle.  Let D1, D2, D3, D4, D5, D6 and D7 be the diameters of the seven circles.  Then, the sum of circumferences of the seven circles would be

π * (D1 + D2 + D3 + D4 + D5 + D6 + D7).

Since

D1 + D2 + D3 + D4 + D5 + D6 + D7 = 60 cm.

The sum of circumferences of the seven circles is (π * 60) cm. or around 188.5 cm.

Support this site

From Our Books Collection

The Last Recreations:  Hydras, Eggs, and Other Mathematical Mystifications

Author:  Martin Gardner

 cover

 

Custom Search

MX iTunes, App Store, iBookstore, and Mac App Store

 

Hosted By Web Hosting by PowWeb

2000-2013 Logicville