Question

the integers 390 andas 9450 have three common positive divisors that are prime numbers. What Is the sum of these prime numbers .?​

Answer 1

The sum of the prime divisor numbers of 390 and 9450 is 10

The first thing we should know is the definition of a prime number.

A number is prime if it is only divisible by 1 and between it, example: 3,5,7,11, and so on

Now we must find the prime divisor numbers of 390 and 9450

Prime divisor numbers of 390:

390/3 = 130

390/5 = 79

390/2 = 195

Prime divisor numbers of 9450:

9450/3 = 3150

9450/5 = 1890

9450/2 = 4725

Thus the prime prime numbers of 390 and 4950 are 2.3 and 5

The sum of these cousins is 2 + 3 + 5 = 10