Number Theory and Cryptography
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Questions and Answers

What does it mean if a ∤ b?

  • b is a divisor of a
  • a does not divide b (correct)
  • a is a factor of b
  • a is a multiple of b
  • Which notation represents 'a divides b'?

  • a∤b
  • b∤a
  • a|b (correct)
  • b|a
  • According to the Division Algorithm, what does 'a = d ×q + r' signify?

  • Expression for division (correct)
  • Expression for multiplication
  • Expression for addition
  • Expression for subtraction
  • Which property states that if a | b and a | c, then a | (b + c)?

    <p>Addition property</p> Signup and view all the answers

    If 4 | 64 and 8 | 64, then what can be inferred from this?

    <p>'4 | 64'</p> Signup and view all the answers

    Study Notes

    Divisibility Notation and Concepts

    • The notation ( a \nmid b ) indicates that ( a ) does not divide ( b ) evenly, meaning there is a remainder when ( b ) is divided by ( a ).

    • The notation for "a divides b" is represented as ( a \mid b ), which means that there exists an integer ( k ) such that ( b = a \times k ).

    Division Algorithm

    • The Division Algorithm states that for any integers ( a ) and ( d ) (where ( d > 0 )), there exist unique integers ( q ) (quotient) and ( r ) (remainder) such that ( a = d \times q + r ) with ( 0 \leq r < d ).

    Properties of Divisibility

    • The additive property of divisibility states that if ( a \mid b ) and ( a \mid c ), then ( a \mid (b + c) ). This means if ( a ) divides both ( b ) and ( c ), it also divides their sum.

    Inference from Divisibility

    • If ( 4 \mid 64 ) and ( 8 \mid 64 ), it can be inferred that both 4 and 8 divide 64 without remainder, confirming their status as divisors of 64.

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    Quiz Team

    Description

    Test your knowledge of number theory and its application in cryptography with this quiz. Explore concepts such as divisors, multiples, and the relationship between integers in the context of cryptographic algorithms.

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