Practice Contradiction And Conclusion (18.1.5)

Practise this section

8 questions

Flashcard drill
2 cards from this section. Quick, good the night before a test.
Exercise
6 questions · about 4 min · pass mark 70%. Hints available.
Sign up to start the exercise
Quiz
2 questions · about 1 min · pass mark 70%. Hints available.
Sign up to start the quiz

6 sample questions

Question 1.
Define a strictly increasing sequence.
Show hintHide hint
Think about a ladder.
Question 2.
What does a subsequence mean?
Show hintHide hint
It's like taking steps, skipping some.
3Question 3.
What type of sequence has all numbers increasing?
- Strictly Decreasing
- Strictly Increasing
- Non-Strict
Show hintHide hint
Consider the sequence like stairs going up.
4Question 4.
True or False: A subsequence can skip elements.
- True
- False
Show hintHide hint
Think about selecting without restricting proximity.
Question 5.
Given a sequence of 10 random integers, prove that there exists a strictly increasing or decreasing subsequence with length 5.
Show hintHide hint
Break down the numbers into subsequences and analyze their lengths.
Question 6.
Create a sequence of 12 distinct numbers and identify an increasing or decreasing subsequence of at least 7 numbers.
Show hintHide hint
Try ascending and descending order to guide your selection.

4 more questions in this section. Enroll free to practise them all.