Answer1:
Firstly, most people will agree that 1 + 4 = 5, without much debate.
They will then add 2 + 5 to the 5 from the top line to get the second answer of 12.
Following this logic, on the third line they will add 3 + 6 to get 9, and add this to the 12 to get 21.
And finally, you will add 8 + 11 in the last equation, which gets 19, and again, add this to the previous answer of 21, to get a final total of 40.
However, this isn’t the only way of solving the problem.