Answer:
The answer is 21
Explanation:
I just took the quiz. for this question lets take the first example 2-3 if you take half of 2 which is 1 then add 2 its 3 and for the next one 10-15 if you take half of 10 which is 5 then add 10 its 15 and then finally 14-? if you take half of 14 which is 7 then add 14 its 21 hope this helps