Question

IV. Directions: Familiarize the letter codes for each number. Try to in
hidden messages. Write your answer on the spaces provided.
1-A
6-F
11-K
16-P
21-U
2-B
7-G
12 -L
17 - Q
22 - V
3-C
4-D
8-H 9-1
13-M 14-N
18-R 19-S
23-W 24 - X
5-E
10-J
15-O
20-T
25-Y
1.)
20 5 13 16 5 18 1 20 21 18 5
19 20 1 20 5
156
16 6 5 3 20 19
2
13 1 20 5 18 9 1 12​

Answer 1

Answer:

Article by NRICH team

Published March 2004,April 2004,December .

magnifying glass

When you think of spies and secret agents, you might think of lots of things; nifty gadgets, foreign travel, dangerous missiles, fast cars and being shaken but not stirred. You probably wouldn't think of mathematics. But you should.

Cracking codes and unravelling the true meaning of secret messages involves loads of maths, from simple addition and subtraction, to data handling and logical thinking. In fact, some of the most famous code breakers in history have been mathematicians who have been able to use quite simple maths to uncovered plots, identify traitors and influence battles.

The Roman Geezer

Let me give you an example. Nearly 2000 years ago, Julius Caesar was busy taking over the world, invading countries to increase the size of the Roman Empire. He needed a way of communicating his battle plans and tactics to everyone on his side without the enemy finding out. So Caesar would write messages to his generals in code. Instead of writing the letter 'A', he would write the letter that comes three places further on in the alphabet, the letter 'D'. Instead of a 'B', he would write an 'E', instead of a 'C', he would write an 'F' and so on. When he got to the end of the alphabet, however, he would have to go right back to the beginning, so instead of an 'X', he would write an 'A', instead of a 'Y', he'd write a 'B' and instead of 'Z', he'd write a 'C'.

Answer 2

The message is, "Temperature state of pfects b matersal."

• The hidden message according to the information given in the question is as follows;

          20 5 13 16 5 18 1 20 21 18 5 = TEMPERATURE

          19 20 1 20 5 = STATE

          15 6 = OF

          16 6 5 3 20 19 = PFECTS

           2 = B

         13 1 20 5 18 9 1 12 = MATERSAL

• Thus, the message is, "Temperature state of pfects b matersal."
• A hidden message is a piece of information that cannot be seen right away and must be discovered, unearthed, and interpreted before it can be understood.
• Backward audio communications, hidden visual messages, and symbolic or cryptic information like a crossword or cipher are all examples of concealed messages.
• The process of hiding a message within another message or a physical item is known as steganography.