Stage: 3 Challenge Level: 
Using some or all of the operations of addition, subtraction, multiplication and division and using the digits 3, 3, 8 and 8 each once and only once make an expression equal to 24.
Addition & subtraction. Mathematical reasoning & proof. Calculating with fractions. Factors and multiples. Working systematically. Multiplication & division. Fractions. Divisibility. Trial and improvement. Generalising.
Published April 2001.
Copyright © 2007. University of Cambridge. All rights reserved.
NRICH is part of the family of activities in the Millennium Mathematics Project, which also includes the Plus and Motivate sites.
email: nrich@damtp.cam.ac.uk
