Adding the verticals gives 3, 7. The difference is 4, so 7 + 4 is 11. 5 + x = 11 so x = 6. Summing the horizontals gives 1 + 3 + 5 = 9. Then 2 + 4 + x = 9 ? So x = 3 which makes no sense.
Adding the verticals gives 3, 7. The difference is 4, so 7 + 4 is 11. 5 + x = 11 so x = 6. Summing the horizontals gives 1 + 3 + 5 = 9. Then 2 + 4 + x = 9 ? So x = 3 which makes no sense.