Posted by mmima on Wednesday, October 7, 2009 at 6:45pm.
use the digits 8,6,1 &4 once each.Arrange the digits to make a 4 digit number.How many different 4digit numbers can you make that are divisible by 7 with no remainder ?

maths  jim, Wednesday, October 7, 2009 at 8:05pm
I don't see a shortcut. Could this just be division practice?
I make it two such numbers of 24 possibilities, one of which is 4186, and the other is predictable from that because 8 mod 7 = 1, and the equation (1000a + 100b + 10c + d = 0 mod 7) works out to (6a + 2b + 3c + d = 0 mod 7). But I still don't quite understand the intent behind the question. Maybe I'm missing something.
Answer This Question
Related Questions
 Maths  I’m a 4digit number. My 1st 2 digits from the left are divisible by 5. ...
 MATH  Need Answer to the Following Please: Using the 9 digits, 1, 2, 3, 4, 5, 6...
 Math  Using the 9 digits, 1, 2, 3, 4, 5, 6,7, 8 and 9 you can arrange four ...
 Math Help Please  Can you Please explain the answer that I received of 2469? It...
 Math  Received answer to the following question from Jishka. (2469) Would you ...
 Math  Need Answer to the Following Please: Using the 9 digits, 1, 2, 3, 4, 5, ...
 maths class 6  1. JUGGLING NUMBERS From old newspapers cut out digits 0 to 9 ...
 Math Help Please  Would you please explain the steps you used to get the answer...
 6 th grade Math  You can find the total number of different 4digit numbers of ...
 Math  1. JUGGLING NUMBERS From old newspapers cut out digits 0 to 9 and stick ...
More Related Questions