Saturday

December 20, 2014

December 20, 2014

Posted by **Connor** on Sunday, October 4, 2009 at 9:59am.

- Math -
**MathMate**, Sunday, October 4, 2009 at 10:14amA number divisible by 11 has the property that the sum of even digits minus the sum of odd digits is 0 or divisible by 11.

14641 is divisible by 11 because

(4+4)-(1+6+1)=0

So if the missing digit is x, and if the number 21321x is divisible by 11, then

(1+2+x)-(2+3+1)=0

solve for x.

- Math -
**Connor**, Sunday, October 4, 2009 at 12:28pmI am not following. The number you placed x in you used the number 21321x, but the number is 21421x. I am not following your steps to solve for x either

- Math-corr. -
**MathMate**, Sunday, October 4, 2009 at 1:26pmSorry, it was a typo. My apologies.

For 21421X

So if the missing digit is x, and if the number 2**1**4**2**1**x**is divisible by 11, then

(**1+2+x**)-(2+4+1)=0

solve for x.

- Math -
**Connor**, Thursday, February 20, 2014 at 4:24pmyo

**Answer this Question**

**Related Questions**

math - Find the value of the missing digit that makes the statement true. 214,...

Math- - Find all values of the missing digit that make the statement true. 5,33_...

Math - Can someone please help me with this question? Find all values of the ...

math divisibility - i need to write the missing digit to make each number ...

math - Find digits A and B in the number below so the folling condition are true...

math - Using the numbers 1 through 9 with no repeats, find a 9 number such that...

math - what is true of all values of x that will make divisible 2*x by6

math - The statement is If a number is divisible by 2 and by 3, then it is ...

Algebra - The five-digit number 31d26 ----- is divisible by 3. Find the sum of ...

math - Who proved this statement using deductive reasoning? If a, b, and c are ...