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 Sujet: divisible
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 Divisibility of 3n^5+7n 2016-12-14 Parag pose la question :Question from Parag, a student: if n is a natural number,then 3n^5+7n is divisible by a)2 b)3 c)5 d)7 i got the answer but still i need a valid alternate approach.Penny Nom lui répond. 4821x14y is an 8-digit number divisible by 72 2014-08-06 RAYA pose la question :if 4821x14y is an 8-digit number divisible by 72. How many values can x and y take?Penny Nom lui répond. The square of any odd number, decreased by 1, is divisible by 8 2012-11-16 bailey pose la question :Prove that the square of any odd number, decreased by 1, is divisible by 8Penny Nom lui répond. The difference of the two numbers 2010-02-15 Steve pose la question :The difference of the two numbers 'abcdef ' and ' fdebca ' is divisible by 271. prove that b = d and c = e.Claude Tardif lui répond. How many combinations of 8614 are divisible by 7? 2008-01-22 Rebecca pose la question :How many combinations of 8614 are divisible by 7 equally (with no remainder)?Penny Nom lui répond. Induction - divisibility 2007-08-04 Jerry pose la question :How would you prove that for any positive integer n, the value of the expression 3^(2n+2) - 8n -9 is divisible by 64.Chris Fisher and Penny Nom lui répond. Divisibility 2007-05-18 Ashish pose la question :A number is divisible by 2^n if the last n digits of the number are divisible by 2^n. Why?Penny Nom and Claude Tardif lui répond. Divisibility by each of the first ten counting numbers 2005-10-17 Simon pose la question :determine smallest positive integer that is divisible by each of the first ten counting numbersPenny Nom lui répond. A 3 digit number divisible by 7 2004-05-03 A student pose la question :We need to arrange 1,3 and 6 to form a 3 digit number that is divisible by 7.Penny Nom lui répond. Divisibility by 2 or 5 or both 2003-10-30 Abdu pose la question :How many positive integers less than 1,001 are divisible by either 2 or 5 or both?Penny Nom lui répond. Three consecutive positive intergers 2003-02-09 Yew pose la question :Prove that when we multiply any consecutive positive intergers, the result is always divisible by 6. ex. (7)(8)(9) = 504 = 6 (84)Penny Nom lui répond. Divisibility of 5 2002 2002-08-25 Simon pose la question :I need to ask you a question if 5 2002 and 3 2002 are divisible by 26. Penny Nom lui répond. Divisibility by 9 2000-10-24 Kelera pose la question :If the sum of the digits of a number is divisible by 9, then the number itself it divisible by 9. Why is that? How do you explain this? Penny Nom lui répond. 111...1222...2 1999-08-11 Brad Goorman pose la question :Let N = 111...1222...2, where there are 1999 digits of 1 followed by 1999 digits of 2. Express N as the product of four integers, each of them greater than 1.Penny Nom lui répond. Divisibility of 2n choose n. 1996-09-24 Kathy Doan pose la question :Can you prove that "2n choose n" is not divisible by 3, 5, and 7 for infinitely many n?Penny Nom lui répond.

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