# A simple debut puzzle [closed]

It's my first time here, so I'm just chumping out a random puzzle I found interesting. It is the following:

1 + 7 = 6

2 + 6 = 4

3 + 10 = 6

5 + 2 = ?

It's probably super easy for you geniuses because I've been the level of ability here, but I just wanted to have throw something out there.

• Ugh, I hate when people abuse the + and = signs.
– Deusovi
Mar 20 '16 at 15:34
• Does + mean something else here? Mar 20 '16 at 16:21
• Hello! Thanks for posting your question! Unfortunately, I'm not sure it's a good fit for this site. We prefer puzzles that have one demonstrably correct answer, especially for mathematical puzzles. But as discussed in this thread, puzzles where you're given a mystery function and have to guess one of the numbers can arguably have a large number of valid answers. This isn't to say that your puzzle is bad, just that it isn't the best fit for this particular site. Mar 20 '16 at 18:21
• Oh. I'll try to give a better puzzle next time, thanks for the heads up! Mar 20 '16 at 22:50

One possibility is

5

Because

You're spelling out the numbers, adding the number of letters, and subtracting 2.

ONESEVEN is 8 letters; 8-2=6
TWOSIX is 6 letters; 6-2=4
THREETEN is 8 letters; 8-2=6
FIVETWO is 7 letters; 7-2=5

My guess is

7

Because

You're summing the number of vertices in each number:

[ ]

(However, as that isn't necessarily very mathematical, I don't necessarily think this is the right answer.

• This seems a viable answer, as any, to me. Mar 20 '16 at 17:49
• If this answer is correct, the puzzle is rather disappointing, because this is not an equivalence relation (not symmetric). 6 only has one vertex. Mar 20 '16 at 22:12
• It's not the answer, but I must admit it's pretty genius. Mar 20 '16 at 22:49

My guess is …

5

Because …

Counting the letters in the english language words for each number and subtracting two gives:
one + seven = 8 letters; 8 - 2 = 6
two + six = 6 letters; 6 - 2 = 4
three + ten = 8 letters; 8 - 2 = 6
five + two = 7 letters; 7 - 2 = 5

• Rats. @BenM ninja'd me :) Mar 21 '16 at 0:31

5, because you might be adding the number of syllables in each line? = can be "equals" or "is"?

• But the first and third lines have different numbers of syllables yet are both 6.
– BenM
Mar 21 '16 at 0:23
• one plus sev en e quals = 6 syllables three plus one zer o is = 6 syllables Mar 21 '16 at 0:25