Welcome Back (Thanksgiving Break) Discrete Math

Welcome Back (Thanksgiving Break) Discrete Math

by Stephanie Balbaneda

​Welcome BACK!

• ​Take a seat and put your phone away

• Take out your laptop

• ​Log into this Quizizz (link in Google Classroom)

• ​Be ready to learn

Poll

Where did you go for Thanksgiving?

• We stayed home

• We went to our family's house

• We went to our friend's house

• We went on vacation

• Other

Poll

Did you help prep/cook your Thanksgiving meal?

• Yes

• No

• I helped out with other things

Open Ended

What was your favorite thing you did over Thanksgiving break?

Poll

Did you go Black Friday shopping?

• Yes

• No

• I shopped online

Open Ended

What are you most thankful for this year?

​Review!

​The following questions are review for "Stir the letters"

​

​This is to help you remember what we did before break

Multiple Choice

What machine was used during WWII to encrypt and decrypt German messages?

• Enigma
• Atbash
• Secret
• Puzzler

Multiple Choice

What was the name of the man who led the team that cracked the German's "Enigma Code" in WW2?

• Tim Berners-Lee

• Alan Turing

• Stephen Hawking

• Bill Gates

Multiple Choice

In Cryptography, original message, before being transformed, is called

• Simple Text

• Plain Text

• Cipher Text

• Filled Text

Multiple Choice

An encryption algorithm transforms plain text into:

• Cipher text

• Simple Text

• Empty Text

• Plain Text

Multiple Choice

What is encryption?

• When you put data / text into code making it difficult to read or understand.
• A secret or disguised way of writing; a code.
• A formal language designed to communicate instructions to a machine
• What is put in, taken in, or operated on by any process or system.

You will need a calculator for the following questions...​

Get ready...​

Multiple Choice

Find the number of words, with or without meaning, that can be formed with the letters of the word ‘CHAIR’.

• 5

• 3125

• 120

• 25

Multiple Choice

How many ways can the letters MATH be arrange?

• 24

• 3,125

• 25

• 100

​The math you did for "MATH"

Looks like 4 X 3 X 2 X 1

​

We call that 4!

​

​"!" called "Factorial"

​

Multiple Choice

What is the value of 5!

• 25
• 15
• 120
• 720

Multiple Choice

7!

• 4050
• 5400
• 5040
• 4500

Multiple Choice

In how many different ways can you arrange the letters MATHS

• 24

• 120

• 5

• 15

Multiple Choice

What is the answer?

• 20

• 40

• 2!

• 3!

​The next questions will be different...

​

​If you finished the last page of your worksheet you will know how to answer them

​

​If you have not, you will have time in class to figure them out.

Multiple Choice

In how many different ways can you arrange the letters in the word TOTAL?

• 120

• 5!

• 60

• 4!

Multiple Choice

How many different arrangements can be made from COLLEGE?

• 28

• 2520

• 5040

• 35280

Multiple Choice

How many ways are there of arranging the letters in the word PARALLEL ?

• 120

• 5!

• 8!

• 3360