Kids will love this math activity because it is so simple to learn and fun to play! Parents and educators will love it because it gets kids excited about math and reinforces skills such as mental math, problem solving, pattern sensing, number sense, concentration, and critical thinking. The brilliance of the game is its simplicity. Within minutes students can begin playing at the easiest level and immediately gain a sense of achievement as they move to more advanced levels. With Double Digits, students will spend countless hours thinking and communicating in the language of mathematics. Double Digits plays the same way as the popular Single Digits edition, but with added number patterns for more challenge. Answers are printed on the reverse side of each card, so solo practice is a breeze. Puzzle Sleeve holders introduce algebra and the concept of looking for variable numbers. The game includes 192 card combinations (48 easy, 96 medium, 48 tough), and four Puzzle Sleeve card holders. The cards are large enough for easy handling, and instructions are included. Many school districts have Math 24 Challenge Contests annually using this product. For ages 10 and up from Suntex International and IQ Kids, your educational toy superstore! Availability: Usually ships in 2-3 business days. 39976 FREE GROUND SHIPPING ON ALL ORDERS OVER $75.00. Please entry FREESHIPPING in the coupon box on the second page of the checkout. Offer valid for the 48 contiguous states. Certain oversize and drop ship items are excluded.