5000 Difficult Numbrex Puzzles to Improve Your IQ

by Kalman Toth and Kalman Toth

PERFECT GIFT FOR NUMBER PUZZLE LOVERS Solving NUMBREX puzzles guarantees to put your brain in top operating condition. NUMBREX puzzles challenge your mind two ways. First translate the result of an addition, subtraction, multiplication or division to decimal from binary, hexadecimal or roman numeral number formats. Second calculate the missing second operand in the arithmetic operation. NUMBREX & SOLUTION 2952.53 - ____=10000 2953.7 * ____=LXXXIV...

• Format: Paperback
• Language: English
• ISBN: 1494349698
• ISBN13: 9781494349691
• Release Date: December 2013
• Publisher: Createspace Independent Publishing Platform
• Length: 262 Pages
• Weight: 1.04 lbs.
• Dimensions: 0.6" x 7.4" x 9.7"