Any square of a Prime number 13 or greater, like 169.
169
49 has exactly 3 factors (1, 7, and 49) and is greater than 40 and less than 60.
That's a prime number.
30
That's a prime number.
169
The number that is greater than 12, less than 40, and has exactly 3 factors is 25. A number has exactly 3 factors if it is the square of a prime number. In this case, 25 is the square of the prime number 5 (5² = 25), and it has the factors 1, 5, and 25.
Prime Number
a prime number
A prime number !
composite number! ;)
Any composite number will do. No primes!
a prime number
49 has exactly 3 factors (1, 7, and 49) and is greater than 40 and less than 60.
That's a prime number.
30
510510