There’s this thingie going around on fb
1 + 5 = 12
2 + 10 = 24
3 + 15 = 36
then
5 + 25 = ?
I say the correct answer is 30.
Just because somebody wants to say 1 + 5 + 12, 2 + 10 = 24, and 3 + 15 = 36 doesn’t make it so, so the correct answer is 30.
I understand how people get 60, I figured out how some come up with 48.
I still think it’s 30.
I’d guess 60, but then I know zilch about fb culture.
Me, too.
Me six. But I see the OP’s point. The previous examples are not necessarily rules, just bad math.
How do you get 48?
of course it’s 30. If you used an undefined function (instead of than “+” ) the answer would be 60. But I don’t understand facebook etiher
Probably 60, on the basis that the initial number in each equation is talking about sevens.
One seven + 5 = 12
2 sevens + 10 = 24
3 sevens + 15 = 36
then
5 sevens + 25 = 60
Why you should assume that these numbers refer to multiples of 7 is beyond me, but it does make the equations work.
n/p
60 seems the obvious answer to me. But I wouldn’t be surprised if there’s more than one logically defensible answer.
ETA: Of course, literally, 5+25 is 30. But if the question is supposed to be a pattern-finding type of question (like “if 1+5=12; 2+10=24, 3+15=36, what is 5+25” type of thing, where we accept the initial examples as being correct.) then 60 is at least the obvious “correct” answer.
Strikes me as a lame puzzle, but either you’re going to treat it as a puzzle or you’re going to, inexplicably, treat it as something else. If you treat it as something else, why on earth are you bothering with it? If you treat it as a puzzle, then like all puzzles you have to figure out the internal rules of the puzzle. In this one, it seems to be saying, “If you add two groups of these things together, the sum is double what you’re adding.” To put some words with the equations, you might say, “1 [pair of socks] + 5 [pairs of socks] = 12 [socks].” That’s perfectly fine math, with those words–and discovering those words, or similar ones, are what the puzzle’s all about.
Exactly. And my brain didn’t even go that deep into the pattern. I just saw 1,2,3,5 in the first column, then multiples of 5 in the second column, and then multiples of 12 in the third column. As the “5+25=?” continued the a+5a=12a pattern, I just assumed the answer was 12*5. If the question was given as “5+23=?” that would have been a little trickier, and required me to follow your train of thought to get 56.
But I suspect there’s a few different defensible answers.
I would imagine from looking at the progression of sums on the right side and seeing that it would be next (12, 24, 36, 48…) without noticing that the left side skipped the “4 + 20” step.
wow. I saw two of the first number plus two of the second number equals the answer. No “sevens”, but also got 60
As far as it being a puzzle, I’m not sure. Might just be a variation of the Lincoln joke about when you call a calf’s tail a leg and ask how many legs a calf would then have, the answer is four. Calling it a leg doesn’t make it a leg.
Actually, it’s even simpler if the operation isn’t simply “add” but “add and multiply by two” Then (1 + 5 ) X 2 = 12 directly, and all the others follow as well. And (5 + 25) X 2 = 60 as with the assumption that the first digit is the number of sevens and the second the number of units. .
72
The numbers on the left are base10. The numbers on the right are base4.
1 + 5 = 12 : 6=14 + 2
2 + 10 = 24 : 12=24 +4
3 + 15 = 36 : 18=3*4 +6
then
5 + 25 = 72 : 30=7*4 +2
And you call yourself Data Guy? 
There’s no such thing as 7 in base 4. Perhaps you mean 132 (116+34+2)?
It’s definitely 30.
It’s a lesson in obedience. We all know the first three equations are incorrect on their face value but are supposed to accept them just cause.
Interesting because I saw it as multiplying the real answer by 2.
1 + 5 = 6 x 2 =12
2 + 10 = 15 x 2 = 30
or that the first column increases by 1s
the second increases by 5s
and the third increases by 12s.
That’s what I thought, a variation of the Lincoln joke.
You’re right! I had the right method but the wrong answer.
132 it is.
There’s no right answer the thing exists for the sole purpose of attracting comments, for some seo purpose, probably.