Download Factors-GCF-Prime Factorization File

Factors of 24:
Array
Prime
Divisibility Rules:
Table
Prime Factorization of 240
2: if even (ends in 0,2,4,6,8) Example 52,894
3: if the sum of the digits is divisible by 3 Example 852
8+5+2 = 15/3 = 5
4. if the last two digit are divisible by 4 Example 63,824
24/4 = 6
5: if the number ends in 0 or 5 Example 987,545
6: if the number is divisible by 2 and 3
Example 9,414 is divisible by 2 and 3
8: if the last three digits are divisible by 8
Example 45, 888 888 /8 = 111
9: if the sum of the digits is divisible by 9
Example 8,235 8+2+3+5 = 18/9= 2
10: if it ends in 0 Example 78,940
Finding GCF using Prime Factorization
 Exaclty two
factors
(1 and itself)
 Example 5
( 1 and 5)
Composite
 3 or more
factors
 Example 8
(1,2,4,8)
36: 2 x 2 x 3 x 3
54: 2 x 3 x 3 x 3
Multiply 2 x 3 x 3 = 18