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3 cards from this section. Quick, good the night before a test.
Calculate 10 mod 3.
Think about dividing 10 by 3 and looking for the remainder.
What is -7 mod 5?
Adjust -7 into the positive range before calculating the mod.
What does 'a ≡ b (mod N)' mean?
Think about the remainder from the division.
True or False: Division in modular arithmetic can always be performed.
Reflect on what happens when you divide numbers.
Given a = 17, b = 5, and N = 6, perform the operation a - b and then find the modulo.
First perform the subtraction, then apply modulo.
Can you determine the conditions under which modular division is valid if a = 15, b = 5, and N = 8?
Check if the divisor b is invertible mod N.
5 more questions in this section. Enroll free to practise them all.
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