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2 cards from this section. Quick, good the night before a test.
What is 9 mod 4?
Divide 9 by 4 and find the remainder.
Is 7 ≡ 2 (mod 5)?
Check the difference of the numbers.
What is 11 mod 4?
Perform integer division and focus on the leftover.
Is it possible to cancel numbers in a modular division?
Remember examples that contradict this.
Find all integers A where A ≡ 3 (mod 5) and A ≤ 20.
List multiples of 5 and add 3.
Explain how to prove that two numbers are congruent if their difference is divisible by the modulus.
Focus on expressing remainders.
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