10 = 2 × 5 11 = 11 is a prime number.
The 5th prime number is 11, and the 5th Fibonacci number is 5.The sum will be 11 + 5 = 16
The prime numbers in the range 1-14 are 2, 3, 5, 7, 11 and 13.
5 + 7 + 11 = 23
13 is prime so it is not the number. 15 is the product of 3 and 5, two prime numbers, so it fits the conditions. 17 is prime so it is not the number. 19 is prime so it is not the number. 15 is the only odd number between 11 and 21 that fits the conditions. However, if 21 is included in the range, it also is the product of two prime numbers: 3 x 7.
7 11.
The numbers 5, 7, 11 and 13 are prime (including the boundaries).
There are two : 5 and 7.
The only prime number between 5 and 10 is 7.
2 3 5 7 11 13
2, 3, 5, and 7; also, if it is 1 to 11 inclusive, the list should include 11 because it is a prime number.
10 = 2 × 5 11 = 11 is a prime number.
The 5th prime number is 11, and the 5th Fibonacci number is 5.The sum will be 11 + 5 = 16
It is: 2*3*5*7*11 = 2310 inclusive or 3*5*7 = 105
5, 11 and 17 are prime number but 9 and 27 are composite numbers
It is 13: 2, 3, 5, 7, 11, 13, 17 . . .
The prime numbers in the range 1-14 are 2, 3, 5, 7, 11 and 13.