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Introduction

If you:
 
  • like crossword and puzzles,
  • are interested in code-breaking,
  • maths problems
  • foreign languages.

take a look at our Challenges aimed at all ages and levels of ability.

 
All Mixed Up

All Mixed Up

This is a set of challenge that increase in difficulty.
 
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Finding Mr X

Finding Mr X

Finding Mr X This challenge is especially designed for junior investigators.
 
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Operation Safecode

Operation Safecode

This challenge is in six parts, each containing three puzzles, and all leading to a single answer which takes the form of a 9-letter word with a mathematical connection.
 
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Cracking the Code

Cracking the Code

The Criminal Investigation Service are chasing the leader of a large criminal gang, a well known liar and cheater.
 
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War Time Heroes

War Time heroes

This GCHQ Challenge was launched to coincide with National Commemoration Week in July 2005.
 
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