# Jan. 11 Math Mystery Year Puzzle: First Clinical Use of the X-Ray

January 11 of the

*Mystery Year*was a key date in the development of X-rays. Algebra skills in clues for the puzzle involve solving problems by writing and solving equations, using variables to represent two quantities where one quantity is written in terms of the other, error analysis to find and correct an error in a series of steps, and logical reasoning. The clues for finding the year connect to the invention of the X-ray through a variety of problems dealing with unknowns.Your PDF download includes:

- 1-page printable student puzzle
- 2-page digital version with horizontal layout and larger print
- 4 pages of Teacher Notes including step-by-step solutions, historical notes, and more
- 3-page
*Extension: Circuit Training*

**Common Core Standard:**6.EE.B.5, 6.EE.B.6, 6.EE.B.7, 6.EE.C.9, 7.EE.B.4, 8.EE.C.7

**File Format:**PDF

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January 11 of the

*Mystery Year*was a key date in the development of X-rays. Algebra skills in clues for the puzzle involve solving problems by writing and solving equations, using variables to represent two quantities where one quantity is written in terms of the other, error analysis to find and correct an error in a series of steps, and logical reasoning. The clues for finding the year connect to the invention of the X-ray through a variety of problems dealing with unknowns.Your PDF download includes: