You may also like

problem icon

A Method of Defining Coefficients in the Equations of Chemical Reactions

A simple method of defining the coefficients in the equations of chemical reactions with the help of a system of linear algebraic equations.

problem icon

The Codabar Check

This article explains how credit card numbers are defined and the check digit serves to verify their accuracy.

problem icon

Tournament Scheduling

Scheduling games is a little more challenging than one might desire. Here are some tournament formats that sport schedulers use.

Weekly Problem 44 - 2007

Stage: 3 and 4 Challenge Level: Challenge Level:1
The lunch bill and tip total £28, so Gill and her friend should both pay £14 each. As Gill has paid £25.50, she should now receive £25.50 - £14, that is £11.50.

This problem is taken from the UKMT Mathematical Challenges.

View the previous week's solution