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The Final Two Multiplication Cryptarithms

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Number Play · Number Play · 4:03

You'll learn: The Final Two Multiplication Cryptarithms

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The Final Two Multiplication Cryptarithms

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The Final Two Multiplication Cryptarithms

You'll learn: The Final Two Multiplication Cryptarithms

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15

Which Numbers Are Sums of Consecutive Numbers?
3:32
Which Numbers Are Sums of Consecutive Numbers?
You'll learn: Which Numbers Are Sums of Consecutive Numbers?
Eight Ways to Place Plus and Minus Signs
3:25
Eight Ways to Place Plus and Minus Signs
You'll learn: Eight Ways to Place Plus and Minus Signs
What Stays the Same in the Eight Expressions?
3:18
What Stays the Same in the Eight Expressions?
You'll learn: What Stays the Same in the Eight Expressions?
Why Changing a Sign Does Not Change Parity
3:24
Why Changing a Sign Does Not Change Parity
You'll learn: Why Changing a Sign Does Not Change Parity
One Parity Result, Two More Explanations
3:36
One Parity Result, Two More Explanations
You'll learn: One Parity Result, Two More Explanations
Tell Whether an Expression Is Even Without Evaluating It
3:28
Tell Whether an Expression Is Even Without Evaluating It
You'll learn: Tell Whether an Expression Is Even Without Evaluating It
Does an Algebraic Expression Always Give an Even Number?
3:20
Does an Algebraic Expression Always Give an Even Number?
You'll learn: Does an Algebraic Expression Always Give an Even Number?
Two Types of Even Numbers
3:14
Two Types of Even Numbers
You'll learn: Two Types of Even Numbers
When Do Two Even Numbers Add to a Multiple of Four?
3:12
When Do Two Even Numbers Add to a Multiple of Four?
You'll learn: When Do Two Even Numbers Add to a Multiple of Four?
Add or Subtract Two Multiples
3:15
Add or Subtract Two Multiples
You'll learn: Add or Subtract Two Multiples
A Divisible Sum Does Not Force Divisible Parts
3:24
A Divisible Sum Does Not Force Divisible Parts
You'll learn: A Divisible Sum Does Not Force Divisible Parts
Multiples Keep Factors—but Not Every Larger Multiple
3:30
Multiples Keep Factors—but Not Every Larger Multiple
You'll learn: Multiples Keep Factors—but Not Every Larger Multiple
When Do Two Divisibility Tests Combine?
3:29
When Do Two Divisibility Tests Combine?
You'll learn: When Do Two Divisibility Tests Combine?
Can an Odd Plus an Even Be a Multiple of Six?
3:07
Can an Odd Plus an Even Be a Multiple of Six?
You'll learn: Can an Odd Plus an Even Be a Multiple of Six?
One Remainder, Two Algebraic Descriptions
3:27
One Remainder, Two Algebraic Descriptions
You'll learn: One Remainder, Two Algebraic Descriptions