What is my number?
Clue 1. My number is a multiple of 5, but it does not end in 5.
Clue 2. The prime factorization of my number is a string of three numbers.
Clue 3. Two of the numbers in the prime factorization are the same.
Clue 4. My number is greater than the seventh square number.
>49
ends in 0
prime factors are 2,5,?
one factor is repeated:
2*5*2 = 20 -- nope
2*5*5 = 50 -- yep