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3 cards from this section. Quick, good the night before a test.
What is 15 mod 4?
Subtract multiples of 4 from 15.
Is 8 ≡ 2 mod 6 true or false?
Check the difference between 8 and 2.
What is the result of 12 mod 5?
Perform the division and find the leftover.
6 ≡ 0 mod 3 is true or false?
Consider the definition of congruence.
If a = 17, b = -5, and N = 6, find a * b mod N.
Calculate the product first, then reduce using mod.
Demonstrate, with a counterexample, that you cannot cancel terms in modular division.
Find values where the terms are not congruent.
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