# Math

posted by .

An odd number is less than 160 and has exactly three defferent prime factors. What is the number? Explain your reasoning.
???

AAAH! help!

• Math -

the first few primes are 3,5,7,11,13,...
if we are to take any 3 and multiply, the only combination that is under 160 is
3x5x7 = 105
if we try to include the next prime, the 11, our product will be greater than 160 (3x5x11 = 165)

so 105 it is !

## Similar Questions

1. ### conjectures

I'm finishing my math 20 Pure. This is my last 20 course then i have 30's. Also I have to work a full time job so that I can live on my own with my boy. So it is tough but I'm doing alright. What about you?
2. ### math

You can use the prime factorization of a number, written as the product of powers of prime numbers, to find the number of factors the number has. First, express the number as a product of powers of prime numbers; for example, 36=2^2 …
3. ### math

how often does a leap year occur? what are al the prime numbers less then 12. what is the eighth multiple of 32?
4. ### math

number is greater than 50 and less than 100. you can make exactly 5 different rectangles with a mystery numbers of tiles. its prime factorization consists of only one prime number. whats my number
5. ### math

Which number between 29 and 39 has three different prime factors?
6. ### 5th grade math help

my mommy and daddy cant explain explain what is wrong with the reasoning number 5 is a composite number because it has the factors 2 and 2.5 i know its a prime number but i cant explain the answer to the question above.
7. ### Math

Let n = c x p, where p is a prime number, and c is a composite number less than p. The number c has three unique prime factors. How many unique prime factor does n^2 have?
8. ### Math

What prime number am I? I have 3 prime factors Each prime factor is a different number I am a multiple of 10 I am less than 50
9. ### Math

What prime number am I? • I have three prime factors • each prime factor is a different number • I am a multiple of 10 • I am less than 50 Please help answer this question?
10. ### Math

What is my number? 1.My number is a perfect square 2.The only prime number in it's prime factorization is 2 3.My number is a factor of 32 4. The sum of it's digits is odd.

More Similar Questions