12
The number between -14 and 13 is -1/2 or -0.5
13
13 is a prime number between 1 and 100. There are 24 others.
It is: 13
13 if you refer to a number line. If you subract you will get -1-12 = -13
10 (between 7 and 13)
the reciprocal (aka multiplicative inverse) of a number is 1/number, so the reciprocal of -13 is -1/13 (I moved the negative from the 13 to the 1 as per convention, 1/-13 = -1/13). The reciprocal of any number is what you have to multiply that number by to yield 1. -13 * -1/13 = (-13*-1)/13 = 13/13 = 1
28 is one such number.
The factors of 13 are 1 and 13. Their product is 13.
The whole number between 13 and 17 is 15
The prime number between 8 and 13 is 11.
21 between 13 and 34; it is the Fibonacci numbers where each successive number is the sum of the previous two.