Complete the series of number's image ?

Question

Answer 1

each image lower cell is half of sum of upper two cells. So

x = (4+2)/2
or x = 3

Answer 2

7+3=10 SO THE HALF IS 5
8+6=14 SO THE HALF IS 7
2+10=12 SO THE HALF IS 6
SO THE RIGHT ANSWER IS 4+2=6 AND THE HALF IS 3 .
SO THE ANSWER IS 3

Answer 3

7+8+2+4=21
3+6+10+2=21
21-(5+7+6)=21-18= 3(Ans)

Comments

Answer is correct however explanation is wrong,
Correct explanation is in each image lower cell is half of sum of upper two cells. So x=(4+2)/2=3