Practice Helping Lemma - 11.2.4 | 11. Uniqueness Proof of the CRT | Discrete Mathematics - Vol 3
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Practice Questions

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Question 1

Easy

What does it mean for a number 'a' to divide 'b'?

💡 Hint: Think about the division operation.

Question 2

Easy

State Euclid's Lemma in your own words.

💡 Hint: Relate it to an example you’ve seen.

Practice 4 more questions and get performance evaluation

Interactive Quizzes

Engage in quick quizzes to reinforce what you've learned and check your comprehension.

Question 1

What does Euclid’s Lemma state?

  • p divides the product implies p divides none of them
  • p divides the product implies p divides at least one of them
  • p is always greater than one

💡 Hint: Think about how prime factors interact with products.

Question 2

True or False: The Helping Lemma assures the existence of unique solutions in CRT.

  • True
  • False

💡 Hint: Remember the implications of congruences and moduli.

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Challenge Problems

Push your limits with challenges.

Question 1

Given the congruences x ≡ 3 mod 4, x ≡ 4 mod 5, and x ≡ 2 mod 6, find all possible values of x.

💡 Hint: You must consider each modulus and their pairwise relations.

Question 2

Demonstrate why the Chinese Remainder Theorem cannot work if the moduli are not pairwise coprime, with a specific example.

💡 Hint: Think about divisibility and overlap in factors.

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