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  5. Dec. 3 Math Mystery Year Puzzle: RCA Announces New 7-inch Record Format
Dec. 3 Math Mystery Year Puzzle: RCA Announces New 7-inch Record Format
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Dec. 3 Math Mystery Year Puzzle: RCA Announces New 7-inch Record Format

This warm-up puzzle for middle school has math clues involving unit rate, probability, area of the remaining portion of a circle when an inner concentric circle is removed, greatest common factor, and least common multiple. The context is finding the Mystery Year that 7-in. 45 RPM records were announced.

Your PDF download includes:
  • 1-page printable student puzzle
  • 2-page digital version with horizontal layout and larger print
  • 5 pages of Teacher Notes including step-by-step solutions, historical notes, and more
  • 1-page How to Use History-Mystery Puzzles
PREVIEW FILE
Common Core Standard: 7.G.B.4, 7.SP.C.5, 6.NS.B.4, 6.RP.A.3b, 6.RP.A.3c
File Format: PDF
Your Price: $1.00

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