You may also like

problem icon

Procedure Solver

Can you think like a computer and work out what this flow diagram does?

problem icon

Adding Machine

Can you set the logic gates so that this machine can decide how many bulbs have been switched on?

problem icon

Not Another NAND!

Prove that you can make any type of logic gate using just NAND gates.

Circular Circuitry

Stage: 5 Challenge Level: Challenge Level:3 Challenge Level:3 Challenge Level:3

Think of a circuit as a flow of electrons. As a switch is flipped on, electrons flow from the switch. What happens when they reach a gate? Trace the path of the current around the circuit.

This problem involves the sort of thinking typically found formally in Decision Mathematics modules, but can be attempted armed only with a basic understanding of logic and truth tables.

The NRICH Project aims to enrich the mathematical experiences of all learners. To support this aim, members of the NRICH team work in a wide range of capacities, including providing professional development for teachers wishing to embed rich mathematical tasks into everyday classroom practice. More information on many of our other activities can be found here.
Copyright © 1997 - 2012. University of Cambridge. All rights reserved.
NRICH is part of the family of activities in the Millennium Mathematics Project.