
Proof by Contradiction and Composite Numbers

Interactive Video
•
Mathematics
•
11th - 12th Grade
•
Hard

Sophia Harris
FREE Resource
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10 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the primary goal of the problem discussed in the video?
To prove a statement about composite numbers of the form 4n-1
To solve a quadratic equation
To find all prime numbers
To calculate the sum of a series
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which number in the sequence 4n-1 is identified as composite in the video?
11
19
15
23
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the form of numbers being analyzed in the video?
3n+1
5n-2
4n-1
2n+3
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Why is the number 15 significant in the sequence discussed?
It is the first prime number
It is a perfect square
It is the only composite number identified
It is the largest number in the sequence
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the method used to prove the statement about composite numbers?
Proof by contradiction
Inductive reasoning
Direct proof
Empirical observation
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In the context of the video, what does the implication 'P implies Q' represent?
If a number is even, then it is composite
If a number is odd, then it is prime
If a number is composite, then it has a prime factor of the form 4n-1
If a number is prime, then it is even
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the negation of the implication discussed in the video?
A composite number has at least one prime factor of the form 4n-1
A composite number has no prime factors of the form 4n-1
A prime number has no factors
A composite number is always even
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