new math
posted by davonte .
Tell whether each number is divisible by 2, 3, 4, 5, 8, 9, or 10. Some numbers may be divisible by more than one number. 1.324
2.840
3.2,724
4.81,816
5.7,848

new math 
Ms. Sue
We'll be glad to check your answers.

new math 
davonte
i think 840 is divisible by 10
and 7,848 divisible by 2?? 
new math 
Ms. Sue
What other numbers goes into 840 besides 10?
Try them out.
Yes, 7,848 is divisible by 2 and four more numbers. 
new math 
davonte
840:5,2

new math 
Reiny
I sure hope that they still teach the following simple divisibility checks:
 to be divisible by 2, the number must be even
 to be divisible by 3, add up the digits of the number, if
the sum is divisible by 3, so is the number
 to be divisible by 4 , the last two digits must be 00 or the last two digits
must be divisible by 4 , e.g. 840
 to be divisible by 5, the number must end in either 0 or 5
 to be divisible by 8 , the last 3 digits of the number must be divisible by 8
 to be divisible by 9, add up the digits of the number, if
the sum is divisible by 9 , so is the number
 to be divisible by 10, the number must end in 0
I will do the 2,724
it is even, so divisible by 2
sum is 2+7+2+4 = 15 , so divisible by 3
last two digits are divisible by 4 , so divisible by 4
does not end in 0 or 5, so NOT divisible by 5
last 3 digits Not divisible by 8 , so NOT divisible by 8
last digit is not 0 , so NOT divisible by 10
repeat for the other numbers, you could always check with your calculator. 
new math 
davonte
7,848:8
Respond to this Question
Similar Questions

Math
THE BOOK SAYS TO TELL WHETHER EACH NUMBER IS DIVISIBLE BY 2, 3, 4, 5, 6, 9, OR 10. THE NUMBER GIVEN IS 60. WHICH OF THESE NUMBERS ARE DIVISIBLE BY 60? 
Math/Algebra
if you add one number divisible by n and one number not divisble by n will the result be divisible by n? 
math
Indicate whether the deductive reasoning used is an example of affirming the hypothesis or denying the conclusion. 8 If a number is divisible by 3, then the sum of the digits of that number is divisible by 3. The sum of the digits … 
teaching math
Indicate whether the deductive reasoning used is an example of affirming the hypothesis or denying the conclusion. If a number is divisible by 3, then the sum of the digits of that number is divisible by 3. The sum of the digits of … 
teaching math
Indicate whether the deductive reasoning used is an example of affirming the hypothesis or denying the conclusion. If a number is divisible by 3, then the sum of the digits of that number is divisible by 3. The sum of the digits of … 
Math
The question is this: You know that a number is divisible by 6 if it is divisible by both 3 and 2. So why isn't a number divisible by 8 if it is divisible by both 4 and 2? 
math
Using the numbers 1 through 9 with no repeats, find a 9 number such that: the first digit is divisible by 1, the first two digits are divisible by 2, the first 3 digits are divisible by 3, and so on until we get to a 9 digit number … 
Math PLEASE HELP!!!
Which of the following is false? a. A number that is divisible by 3 and 20 is divisible by 60. b. A number that is divisible by 4 and 15 is divisible by 60. c. A number that is divisible by 5 and 12 is divisible by 60. d. A number 
new math
Tell whether each number is divisible by 2, 3, 4, 5, 8, 9, or 10. Some numbers may be divisible by more than one number. 1.324 2.840 3.2,724 4.81,816 5.7,848 
new math
Tell whether each number is divisible by 2, 3, 4, 5, 8, 9, or 10. Some numbers may be divisible by more than one number. 1.324 2.840 3.2,724 4.81,816 5.7,848