28
23 is an odd number between 10 and 30 that gives a remainder of 2 when divided by 7.
14 and 21, and 21 and 28 are the number pairs between 15 and 30 that have 7 as their greatest common factor.
It is 2:7
42
42
6+7+8+9 =307+8+9+10 =348+9+10+11=38However, as the totals 30 and 38 are not between 30 and 38, the only set of 4 consecutive numbers that comes to a total that is between 30 and 38 is the second set, 7+8+9+10, which total 34, a number that is clearly between the numbers 30 and 38.Some might argue that 30 is a number between 30 and 38. If this is so, then the question "What is the number between 5 and 7?" could have the answer 5,6 or 7! But this is clearly incorrect!
28.
30/7 as a mixed number is 4 2/7.
30/7 = 42/7
The easiest way to find the distance between any two numbers on a number line is the bigger number minus the smaller. Here 23 - (-7) = 23+7 = 30. Remember that minus a negative number is the same as plus that number.
7 and 210 do.