Sujet: divisibility by 3 liste de sujets
nouvelle recherche

7 articles trouvés pour ce sujet.

		Page 1/1

	Divisibility by 3		2018-11-20
		Ray pose la question : There is a rule that a number is divisible by 3 if the sum of its digits are divisible by 3 (for example, 81=8+1=9 {divisible by 3} and 33=3+3=6 {again, divisible by 3}) I know this works but I don't know why! Please help. Penny Nom lui répond.
	Some 6 digit numbers		2012-10-23
		Mason pose la question : How many different 6 digit numbers can you make using the digits 1 ,2 5, 6, 7, and 9? How many of these six-digit numbers are divisible by 6? Penny Nom lui répond.
	Powers		2010-10-20
		dylan pose la question : how do you write 20736 in exponential form .same for 1728 and 50625. is there a formula to figure out how to express large know numbers in exponential form. Penny Nom lui répond.
	Divisibility by 3		2010-05-23
		Cathleen pose la question : To math central. I have to do a maths extension question that I don't understand. At first I thought I did. It is about the dividing by three. In one part of the question, it asks me to show that the rule of division by three does not work for 23142 with a little 5 down the bottom. What doe base 5 mean? We first thought that the little 5 down the bottom meant multiplying y the power of five. Can you please tell me what it means so I can finish this question? Penny Nom lui répond.
	The sum of the digits of a number		2008-06-23
		Ben pose la question : Question: Using mathematical induction, prove that if the sum of the digits of a number is divisible by three, then the number itself is also divisible by 3. Penny Nom lui répond.
	Divisibility rules		2001-09-07
		A student pose la question : Why is it that when you add the digits of a number you can tell what the multiples of that number are. Example: 12131313111, 1+2+1+2+1+3+1+1+1=18, therefore 12131313111 is divisble by 2, 9, 18, & 3 because those numbers are divisble by 18. Penny Nom lui répond.
	Divisibility by 3		2000-03-24
		Pat Walsh pose la question : W hy does it work when you add the digits of a number then divid by three to see if the number is divisible by three Penny Nom lui répond.

		Page 1/1