Foundations · Lesson 3 · Practice
Practice: Borders
Every quiz type from this lesson. Start at difficulty 1 and work up; correct answers build your streak, and after a few attempts this page points you at your weakest quiz.
Find all borders
Difficulty 1
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Find all proper borders of 0110.
Difficulty 2
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Find all proper borders of 0010100.
Difficulty 3
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Find all proper borders of 00001111011100.
Difficulty 4
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Find all proper borders of 111011101011110111.
Bordered or unbordered?
Difficulty 1
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Is 0101 unbordered?
Difficulty 2
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Is 100101 unbordered?
Difficulty 3
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Is 1001010111001010 unbordered?
Difficulty 4
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Is 10101010111101 unbordered?
Longest border
Difficulty 1
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What is the longest border of 1011?
Difficulty 2
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What is the longest border of 100101?
Difficulty 3
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What is the longest border of 1101001111101?
Difficulty 4
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What is the longest border of 10101101110101?
Shortest border
Difficulty 1
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What is the shortest border of 010?
Difficulty 2
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What is the shortest border of 110011?
Difficulty 3
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What is the shortest border of 1011110001011110?
Difficulty 4
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What is the shortest border of 1001110010101010?
Construct an unbordered word
Difficulty 1
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Construct a binary word of length 3 that is unbordered.
Difficulty 2
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Construct a binary word of length 10 that is unbordered.
Difficulty 3
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Construct a binary word of length 16 that is unbordered.
Difficulty 4
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Construct a binary word of length 12 that is unbordered.