Any number that has precisely two distinct factors, 1 and itself, is called prime. Numbers that have more than two factors are composite. The lonely number 1 is neither prime nor composite.

1. Understanding Factors,
Multiples, Prime, and
Composite Numbers

2. LEARNING
TARGETS
IDENTIFY THE FACTORS OF
A GIVEN NUMBER UP TO
100.
IDENTIFY THE MULTIPLES OF
A GIVEN NUMBER UP TO
100.
DIFFERENTIATE PRIME AND
COMPOSITE NUMBERS.
1.
2.
3.

3. Miss Reyes requested the 30 Art
club members to display their
work on the wall. They were also
instructed to arrange them in
rows. Each row must have the
same number of Art works. Is it
possible to accomplish this with 5
in a row?

4. WRITE THE MISSING
NUMBERS IN THE BLANKS
TO MAKE TRUE
STATEMENTS.
32 = _____ x ______
49 = _____ x ______
81 = ______ x ______
1.
2.
3.
GET READY

5. FACTORS- ARE NUMBERS THAT YOU
MULTIPLY.THE NUMBER 1 IS A FACTOR
OF EVERY NUMBER.
A multiple of a given number is any product
of that number and a counting number.
If factors are the numbers that you multiply, the
product becomes a multiple of the numbers that you
multiplied. Thus, a multiple of a number is any
number that is a product of that number and a
counting number. The multiples of any number are
infinite.

6. YOU CAN
SKIP
COUNT TO
GET THE
MULTIPLES
OF A
NUMBER.

7. YOU CAN
ALSO USE
DIVISION TO
TELL
WHETHER A
NUMBER IS A
FACTOR OR A
MULTIPLE OF
ANOTHER.

8. THERE ARE
SOME
DIVISIBILTY
RULES THAT
CAN HELP YOU
DETERMINE
IMMEDIATELY
WHETHER A
NUMBER IS A
FACTOR OR A
MULTIPLE OF
ANOTHER
NUMBER

9. 2- if the last digit is an even number
3- if and only if the digit-sum of the number is
divisible by 3

10. 5- if and only if the ones digit is either 0 or 5

11. Page 154

12. Page 155

13. Book Act. 1- page 156-C

14. 5 = 1 x5
13 = 1 x13
19 = 1 x 19

16. 6= 1 x 6, 2 x 3
10 = 1 x 10, 2 x 5
12 = 1 x 12, 2 x 6, 3 x 4

19. Here is a list of the prime
numbers under 100.
2 3 5 7 11
13 17 19 23 29
31 37 41 43 47
53 59 61 67 71
73 79 83 89 97