ACTIVITY 1

Direction: Match A to column B, by identifying which elements define the set. Write the letter of the correct answer on your answer sheet.

Given: the numbers 1, 2, 3, ..., 28, 29, 30 are written on a slips of paper the answer is {3, 6, 9, 12, 15, 18, 21, 24, 27, 30}

B

a. {2, 3, 5, 7, 11, 13, 17, 19, 23, 29}

b. { 1, 3, 5, 7, 9, 11, 13,15,17,19,21,23,25,27,29}

c. {4, 8, 12, 16, 20, 24, 28}

d. {5, 10, 15, 20, 25, 30}

e. {2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28,30}

Illustrative example. {the number is a multiple of 3}

A

1. {the number is even}

2. { the number is a multiple of 5}

3. { the number is divisible by 4}

4. {the number is odd}

5. {the number is prime}​