Tuesday

November 25, 2014

November 25, 2014

Posted by **Izzy** on Monday, October 1, 2012 at 4:30pm.

- Maths -
**Steve**, Monday, October 1, 2012 at 4:45pmif the digits are a,b,c then

5(a+b+c) = abc

c = 5(a+b)/(ab-5)

so, ab must be greater than 5,

ab cannot be 6, since then a+b > 5

if ab=7, then 5(8)/2 = 20 > 10

if ab=8, then c = 5(6)/3 = 10 too big

if ab=9, then c=5(6)/4 = not integer

if ab=10, then c=5(7)/5 = 7

257: 2+5+7 = 14 = 2*5*7/5

**Answer this Question**

**Related Questions**

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

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

Maths - The digits of a three digit number are in AP&their sum is 15.The number ...

Algebra math. - 1) the sum of the digits of a two digit number is 9. The value ...

algebra - the winninq three-digit number in a drawing for a door prize had the ...

Maths - I have a three digit number such that the sum of the cubes of each digit...

math - the product of my three digits is 30. when you add my ones digit and ...

maths I need answer - The sum of the tens and ones digits of a 2-digit number is...

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

Math - Algebra - What is the linear equation that will represent the second ...