Each number in the series is the sum of the previous number and one less than its numerical position in the series.
How it works in this problem:
To get from 2 to 3, add 1
To get from 3 to 5, add 2
To get from 5 to 8, add 3
To get from 8 to 12, add 4
etc.
17 is a prime number. 8 and 12 are not prime numbers.
1.4167
It is 17.
It is 17 because (17+19)/3 = 12
One.
17/12 = 15/12
The rule is: if a number is divisible by 5 and 17 at the same time, that number is divisible by 85
17 is a prime number. 8 and 12 are not prime numbers.
1.4167
12
It is 17.
It is 17 because (17+19)/3 = 12
2 and 12/17
One.
No, 12/17 is in simplest form because 12 and 17 have a GCF of 1. The fraction 34/17 is not in simplest form despite having a prime number in the denominator.
It is: -19/17 = -1 and 2/17
1 and 5/12