I am less than 100 the sum of my digits is 4 and half of me is an odd number. I answered this with the # 11

Let's look at the criteria:

n < 100

sum of digits of n = 4

half of n is odd.

11 is odd itself, but half of 11 is not even a whole number, and thus can't be odd.

Also, its digits do not add to 4. (1 plus 1 is 2)

How are we going to satisfy all of these conditions?

Let's start with that sum of digits = 4 bit.

Here's a list of numbers whose digits add to equal 4:

(only 1-and-2 digit numbers only to stay <100)

4, 13, 22, 31, 40

(When the tens digit increases, the ones digit must decrease to stay = 4.)

Now, for which of these numbers is half of it odd? 22.