Posted by **hamza** on Monday, November 23, 2009 at 7:07pm.

x has 3 digits. the tens digits is half the hundreds digits. the number is odd.the sum of the digits is 9

- math -
**TeacherJim**, Monday, November 23, 2009 at 7:13pm
Let the tens digit be x. Then the hundreds digit is 2x. The sum of these two digits is 3x, and that has to be less than 9, so x must be less than 3 - that is, the tens digit must be 1 or 2.

So we might have:

42U or 21U

where U is the Units digit.

The digits add to 9, so it has to be

423 or 216

But we are told that the answer is odd, and only one of those is odd...

- math -
**Jennifer**, Wednesday, November 19, 2014 at 9:27am
x + 2x = 3x

solve this first

where 3x < 9

3/3 x < 9/3 divide

both sides by 3

1x < or = 3 plug in 3 into the equation.

3 + 3*2 = 3*3

3 + 6 = 9

## Answer This Question

## Related Questions

- math - (1)I am thinking of a 5-digit odd number. (2)The sum of all its digits is...
- Math - You can only use the digits 0-9. I need an odd number that is a multiple ...
- 5th Grade Math - Not only need answer but need to know how you teach a 5th ...
- 5th Grade Math - Not only need answer but need to know how you teach a 5th ...
- MATH - What is my number if the hundreds digit is less than the tens digit and ...
- Math - a number rounds off to 4000.the digits in the hundreds place is twice the...
- math - a number rounds off to 4000.the digits in the hundreds place is twice the...
- math - A number rounds off to 4000.The digits in the hundreds place is twice the...
- Math - I am a 4-digit even number. I am less than 2500. The digits in my ...
- Math - Word Problem : The number has 3 digits the tens digit is half the ...

More Related Questions