In "the twelve days of christmas", how many gifts in all did "my true love give to me?

Answer 1

12 + 11 + 10 + 9 + 8 + 7 + 6 + 5 + 4 + 3 + 2 + 1 = ?

Answer 2

78

Answer 3

Many more depending on how you interpret the words of the song:
1
2 + 1
3 + 2 + 1
4 + 3 + 2+ 1
5 + 4 + 3 + 2+ 1
6 + 5 + 4 + 3 + 2+ 1
7 + 6 + 5 + 4 + 3 + 2+ 1
8 + 7 + 6 + 5 + 4 + 3 + 2+ 1
9 + 8 + 7 + 6 + 5 + 4 + 3 + 2+ 1
10 + 9 + 8 + 7 + 6 + 5 + 4 + 3 + 2+ 1
11 + 10 + 9 + 8 + 7 + 6 + 5 + 4 + 3 + 2+ 1
12 + 11 + 10 + 9 + 8 + 7 + 6 + 5 + 4 + 3 + 2+ 1

Answer 4

Look at triangular numbers for more info...
wikipediadotorg/wiki/Triangular_number