Whichever one you want:
20: It is the only number with a repeated prime factor.
14: It is the only number with two non-adjacent prime factors.
6: It is the only number with two adjacent prime factors.
19: It is the only Prime number.
So now you need to second-guess the person who asked the question!
10
7
The median is 20, as it is the middle number when they are all listed in order.
19 * 14 = (20 - 1) * 14 = 20*14 - 1*14 = 280 - 14 = 266
All three numbers belong to the sequence:Un = n^2 + n + 8 for n = 1, 2, 3, ...
No because 19/20 is greater than 14/15
13 20 12
35
Let number be x Then x - (-14) = 20 or x + 14 = 20 or x = 20 -14 or x = 6 Verification: 6 - (-14) = 6 + 14 = 20
6
20 is the next number greater than 19. The next prime number greater than 19 is 23.
-20/14 is a rational number