Question

How many numbers are written from n to k, including n and k?

Answer 1

k-n+1

Explanation:

take 10 and 5 there are there are 6#s between so it would be 10-5+1 would get you the number.

Answer 2

k-n+1

Explanation:

How many numbers are written from n to k

Lets look at a smaller example with real number

Lets go from 3 to 8

3 4 5 6 7 8

There are 6 numbers

We take 8 -3 = 5, but we include the number 3 so we add it back in +1

5+1 =6

Lets look at a larger example

2 to 11

2,3,4,5,6,7,8,9,10,11

There are 10 numbers

11-2 =9 but we have to add back in the first number

9+1 =10

Now we are going from n to k

k-n = k-n, but we have to add back in the first number

k-n+1