a. 15 and 15
b. 11 and 19
c. 7 and 23
d. 13 and 17
2007-10-28 14:11:56 · 6 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
The answer is d. 13 and 17
a. Is not consecutive numbers, it is the same number!
b. Those two numbers are not consecutive, there is 17!
c. There are a lot of prime numbers between 7 and 23.
This process of elimination gives d. as your answer.
2007-10-28 14:17:24 · answer #1 · answered by Phantom 2 · 0⤊ 0⤋
First of all, answer "A" is not correct since 15 is not a prime number (3*5=15).
Now lets look at the other choices by listing the prime numbers between 7 and 23 (the range you have listed):
7, 11, 13, 17, 19, 23
Thus, by your choices:
B: not possible since two prime number between 11 and 19 and thus not consecutive.
C: not possible since this is the very range that I listed above and thus 4 prime numbers between 7 and 23.
D: This is the correct answer as 13 and 17 have no prime numbers between them and thus are consecutive prime numbers (and which the sum equals 30).
2007-10-28 14:37:55 · answer #2 · answered by Ironman 2 · 0⤊ 0⤋
d 13 and 17
2007-10-28 14:16:38 · answer #3 · answered by Anonymous · 0⤊ 1⤋
15 is not prime (5*3 = 15), so A is wrong.
All the other numbers shown are prime, so we need to see which are consecutive primes.
That would be answer D.
2007-10-28 14:16:20 · answer #4 · answered by Steve A 7 · 0⤊ 0⤋
13 and 17
because:::
a) 15 is NOT prime
b) 11 and 19 are NOT CONSECUTIVE prime
c) 7 and 23 are NOT CONSECUTIVE prime
d) PERFECT ANSWER!!
2007-10-28 14:15:32 · answer #5 · answered by Kamal 2 · 0⤊ 0⤋
d.
2007-10-28 14:16:29 · answer #6 · answered by orange 1 · 0⤊ 1⤋