Sunnies
Math brain teasers require computations to solve.
It was going to be another really hot day, but Ted needed a new pair of cool sunnies* before he could hit the surf. He needed another $52 to buy the ones he wanted.
Ted decided to sell homemade smoothies at his gate: $2 each, or three for $4. He had the $52 after selling 32 smoothies, stopped work and headed off to the beach.
How many smoothies had been sold at the $2 price?
* sunnies = sunglasses in New Zealand & Australia
Answer
14
[14 @ $2 = $28; 18 @ 3 for $4 = $24]
Solution:
If he had sold them all at $2, he would have earned $64. The $12 difference is the discount he gave to six people buying 3 for $4.
So 18 were sold at the discount price  the other 14 were sold individually.
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Comments
annie9698
Oct 14, 2012
 what if he sold 20 @ $2 =$ 40
and 9 @ 3 for 4 = $12
Or
sold 22 @ $2 = $44
and 6 @ 3 for 4 = $8
I haven't done all the math but there may be other solutions too. 
MadAde
Oct 25, 2012
 he could have sold 16 at $3 = $48 and two at $2 = $4 with adds up to the $52 needed. There are numerous answers to this teaser. 
dalfamnest
Nov 01, 2012
 Hey guys  read the Teaser properly! If you ignore one important detail, yes, there's lots of solutions! BUT ... there's one correct solution only. Have another look. 
Eng_Masoud
Jul 07, 2013
 nice 1 dude 
Jimbo
Dec 07, 2014
 The teaser clearly says that he sold 32 smoothies. One solution! 
XminiX
Jun 11, 2015
 I did it in a slightly more complex and an algebraic way.
Let x be the number of smoothies sold which cost $2 each and let y be the number of smoothies sold from the deal of buying 3 for $4.
This means 2x+(4y/3)=52
x+y also= 32 (number of smoothies sold)
If you sold them simultaneously, you will get x=14 
Babe
Apr 17, 2016
 I got the same answer as Annie and thought I was correct. I never was very good at math though, but it was fun trying to figure it out.

catmom
Apr 17, 2016
 Omg do you have any idea how many years ago I took Algebra? (the x & y stuff that was algebra wasn't it) I saved myself a headache and just looked at the answer. 
GusG
Apr 17, 2016
 Thanks, XminiX! 
FatHead
Apr 17, 2016
 Jimbo, he asked how many had been sold at $2 each, not how many had been sold. 
fishmed
Apr 17, 2016
 nice. I did not figure it out, but saw how it worked after the fact. Good one. 
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