Download or read book 20th Century Brainteasers - Challenging written by Cynthia Holzschuher and published by . This book was released on 2000 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Brainteasers series provides challenging ways to exercise and develop brain power! The worksheets in 20th century Brainteasers can be used with History or Social Studies units. The activities are divided into the decades of the 20th century and cover topics such as scrambled names, federation, music, space exploration, the environment and much more. The activities will help students develop logic and other critical thinking skills.