Friday

April 18, 2014

April 18, 2014

Posted by **tyler** on Tuesday, November 8, 2011 at 7:51pm.

im a number between 300 and 400

im divisible by 3 and 4 . but not 9

my tens digit is a square number

the sum of the hundreds digit and the tens digit is a prime number.

find the mystery number

- math -
**Steve**, Wednesday, November 9, 2011 at 4:46amwe know that the number is 3xx

the tens digit is either 1,4, or 9

4+3 =7 is a prime, so the number is 34x

x cannot be 2 or 5, because 342 and 345 are divisible by 9 (cast out nines)

The number must be even, because it is divisible by 4. So, it is either

340 344 346 348 (but 4 does not divide 346)

Only 348 is divisible by 3 (cast out threes)

**Related Questions**

fourth grade math - one factor of the mystery number is 7 the other factor is an...

math - Julie has a mystery number. When she divides the mystery number by 5, ...

math - my daughter needs help finding a mystery number. 1)when the mystery ...

Math - Find the mystery digit in 5---,642,089,the mystery does not appear in any...

math - a mystery number is bigger than 50 and larger than 100. you can make ...

math - a mystery number is bigger than 50 and larger than 100. you can make ...

Mystery number - the mystery number is a two didget even number.it is a multiple...

math - lionel says the digits in his mystery number have a sum of 6. you say ...

maths - This mystery number has four digits. Each digit is an even number. All ...

Mystery number - The mystery number is a two didget even number. It is a ...