Evelyn B. Christensen
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Venn Perplexors Level C/Grades 6-9 (MindWare's Best Logic Problems)
Kentucky Puzzles:: Bluegrass Brainteasers for Ages 6 to 106
Math Mosaics Addition Adventures
MindWare Fraction Finders Workbook
Mensa® for Kids: Fun Puzzle Challenges: Terrific Ways to Stretch Your Brain! (Mensa's Brilliant Brain Workouts)
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