We found that there are 8 possible ways of completing the first challenge of making 5 with the numbers 1-5 on the magic V (see uploaded picture attached for proof on a whiteboard). We then tried making 6 with the numbers 2-6 but found it wasn't possible. We then decided that it might not be possible with even numbers but possible with odd numbers, so we tested 7 as the next odd number total. However, we also found that this was impossible.
We decided that it wasn't possible to complete a magic V without the number 1 because the numbers always include 1 less than the total you are trying to add up to so you always need to be able to add one more. For example if you are making 7, you 6 and 1.
Please let us know if there is something we missed or misunderstood about this problem.
Thank you!