Thursday, 10 January 2013

Primes (Notes, p2) Q1, Q2, Q3, Q7

The following statements are false.
Explain or illustrate with examples (if applicable) to show why they are false

Q1 All odd numbers are prime.

Q2 All prime numbers are odd.

Q3. All even numbers are composite.

Q7. A prime number is always smaller than a composite number.

Enter your response, label them neatly.
Remember to sign off with your group number.

10 comments:

  1. Group 3
    I) no, 1 is an odd number but it is not a prime number but is a unit.
    II) no, 2 is a prime number but it is an even number
    III) no, 2 is a prime number but it is a even number
    VII) no, 7, which is a prime number is larger than 4 which is a composite number

    ReplyDelete
    Replies
    1. Q1: Correct
      Q2: Correct
      Q4: Correct
      Q7: Correct

      Score: 4 points

      Delete
  2. Q1. Because number 9 is not a prime number as it has more than 2 factors

    Q2. Number 2 is even and is a prime number

    Q3. No. Number 2 is a prime number and is even

    Q7. You can compare the largest prime number with the smallest composite number.

    ReplyDelete
    Replies
    1. Q1: Correct. Good to enforce the fact that "9 is an odd number"
      Q2: Correct
      Q4: Correct
      Q7: Elaborate or illustrate with an example.

      Score: 3 points

      Delete
  3. This comment has been removed by the author.

    ReplyDelete
  4. This comment has been removed by the author.

    ReplyDelete
  5. Q1 All odd numbers are prime.
    A1 False. 9 is a odd number but it is a composite

    Q2 All prime numbers are odd.
    A2. False. 2 is a prime number which is also a even number

    Q3. All even numbers are composite.
    A3. False. 2 which is a even number is a prime.

    Q7. A prime number is always smaller than a composite number.
    Q7. False. A prime number like 17 is greater than 4 which is a composite

    ReplyDelete
    Replies
    1. Q1: Correct
      Q2: Correct
      Q4: Correct
      Q7: Correct

      Score: 4 points

      Delete