Thursday

January 29, 2015

January 29, 2015

Posted by **Anonymous...urgent!** on Monday, March 4, 2013 at 12:24am.

- GEOmetry -
**Steve**, Monday, March 4, 2013 at 4:46am10000 = 10^4 = 2^4 * 5^4

so, the digits must be all 1's, 2's and 5's

Since you need all 8 2's and 5's to get 10,000, no 7-digit number will do it.

- GEOmetry -
**Devin**, Wednesday, March 6, 2013 at 8:51am4455551 = 4x4x5x5x5x5x1=10000

the proof is not valid.

**Answer this Question**

**Related Questions**

probability - How many 7 digit positive integers are there such that the product...

probability - How many 7 digit positive integers are there such that the product...

triple digit digit product - What is the smallest 3-digit positive number whose ...

math - How many different positive four-digit integers can be formed if the ...

math - Find a six-digit even number containing no zeros and no repeating digits ...

math - Find the sum of all positive integers m such that 2^m can be expressed as...

algebra - It is a five digit whole number 1. It is a palindrome 2. It's ...

math - Can u please help me with this..this is my sons 6th grade work and im ...

maths - The product of the digits of a positive two-digit number exceeds the sum...

Pre-Algebra - -My tens and units digits are consecutive integers whose product ...