Note: Some of these rules will be more useful to find the Factors.
Characteristic of number
|
Number divisible by
|
Example
|
The last digit is even
|
2
|
208
|
The sum of all digits is divisible by 3
|
3
|
114
1+1+4 = 6
|
The last two digits are divisible by 4
|
4
|
288
|
The last digit is 0 or 5
|
5
|
75 or 50
|
The number is divisible by 2 and 3
|
6
|
2,154
|
Double the last digit, subtract it from the rest of the number. Is your answer divisible by 7?
|
7
|
574
4×2 = 8, 57−8 = 49, 49 ÷ 7 = 7
|
The last three digits are divisible by 8
|
8
|
1,888
|
The sum of the digits is divisible by 9
|
9
|
342
|
The number ends in 0
|
10
|
2,060
|
The number is divisible by both 3 and 4
|
12
|
3,024
|
» Go through each rule and see if it applies.
No comments:
Post a Comment