Code Breaking 101 - Module 02
The history of espionage goes back further than you might think!
The Romans first invented Roman Numerals to send coded messages between Roman spies. Modern agents still use this ancient code to this very day. This module will get you up to speed with its main use.
The history of espionage goes back further than you might think!
The Romans first invented Roman Numerals to send coded messages between Roman spies. Modern agents still use this ancient code to this very day. This module will get you up to speed with its main use.
Beginner Level: Number Building
Let's start by building up some numbers where the numerals get smaller from left to right:
Refer to the decoder above as you look at this example carefully:
II = 2, XII = 12, XXXII = 32, LXXXII = 82, CLXXXII = 182 CCCLXXXII = 382
Let's practise...
Beginner Level: Number Building
Let's start by building up some numbers where the numerals get smaller from left to right:
Refer to the decoder above as you look at this example carefully:
II = 2, XII = 12, XXXII = 32, LXXXII = 82, CLXXXII = 182 CCCLXXXII = 382
Let's practise...
Which of these numerals represents 50?
X
C
L
V
Intermediate Level: Subtraction
This is the part most people find tricky. Take your time.
"A lower numeral before a higher numeral indicates subtraction."
Look at these examples carefully:
VI = 6, IV = 4
XI = 11, IX = 9
DC = 600, CD = 400
MD = 1500, MC = 1100, MCD = 1400 (CD = 400)
Let's practise...
Intermediate Level: Subtraction
This is the part most people find tricky. Take your time.
"A lower numeral before a higher numeral indicates subtraction."
Look at these examples carefully:
VI = 6, IV = 4
XI = 11, IX = 9
DC = 600, CD = 400
MD = 1500, MC = 1100, MCD = 1400 (CD = 400)
Let's practise...
Which of these represents 2410?
MMDCX
MMCDX
MCMDX
MMXCDX
Advanced Level: Locate it
Phew! If you've made it this far, you're doing well. We can now reveal the true modern-day use of this ancient Roman code.
GPS Location Data!
Remember, Rookie Recruits, that this is top secret, so keep it under your hat.
VITEL INTEL:
Hyphens and full stops remain the same but must be present when decoding.
The Romans didn't assign a letter to zero, but 21st-century spymasters have cunningly assigned this the letter Z.
Let's use what you've learned to reveal a secret location...
Advanced Level: Locate it
Phew! If you've made it this far, you're doing well. We can now reveal the true modern-day use of this ancient Roman code.
GPS Location Data!
Remember, Rookie Recruits, that this is top secret, so keep it under your hat.
VITEL INTEL:
Hyphens and full stops remain the same but must be present when decoding.
The Romans didn't assign a letter to zero, but 21st-century spymasters have cunningly assigned this the letter Z.
Let's use what you've learned to reveal a secret location...
What are the full coordinates?
60.2641,-5.0512
50.2741,-5.0512
50.2641,-4.0512
50.2641,-5.0512
What is the secret location? (Enter the coordinates into your preferred search engine and name the building the map marker places you in, giving a two-word answer (5,9))
Excellent work, Rookie Recruit!
That's Module 02 complete.
Click Finish to reveal your score, and keep an eye on your inbox for Module 03 / 05 coming soon!
Click Finish to reveal your score, and keep an eye on your inbox for Module 03 / 05 coming soon!
Excellent work, Rookie Recruit!
That's Module 02 complete.
Click Finish to reveal your score, and keep an eye on your inbox for Module 03 / 05 coming soon!
Click Finish to reveal your score, and keep an eye on your inbox for Module 03 / 05 coming soon!
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