SOLUTION: If 1+4=5 and 2+5=12 and 3+6=21. What does 5+8 equal.?

Algebra ->  Customizable Word Problem Solvers  -> Misc -> SOLUTION: If 1+4=5 and 2+5=12 and 3+6=21. What does 5+8 equal.?      Log On

Ad: Over 600 Algebra Word Problems at edhelper.com


    

Question 1087688: If 1+4=5 and 2+5=12 and 3+6=21. What does 5+8 equal.?
Found 4 solutions by Alan3354, MathLover1, Edwin McCravy, ikleyn:
Answer by Alan3354(69443) About Me  (Show Source):
Answer by MathLover1(20850) About Me  (Show Source):
You can put this solution on YOUR website!
1%2B4=highlight%285%29
2%2B5=highlight%2812%29=>2%2B5%2Bhighlight%285%29=highlight%2812%29
3%2B6=highlight%2821%29=>3%2B6%2Bhighlight%2812%29=highlight%2821%29
to find what does 5%2B8 equal, you need first find 4%2B7
4%2B7=highlight%2832%29=>4%2B7%2Bhighlight%2821%29=highlight%2832%29
and 5%2B8=highlight%2845%29 =>5%2B8%2Bhighlight%2832%29=highlight%2845%29

Answer by Edwin McCravy(20064) About Me  (Show Source):
You can put this solution on YOUR website!

1+4 means multiplying 1 times 4, getting 4, then adding 1, getting 5.
2+5 means multiplying 2 times 5, getting 10, then adding 2, getting 12.
3+6 means multiplying 3 times 6, getting 18, then adding 3, getting 21.
4+7 means multiplying 4 times 7, getting 28, then adding 4, getting 32.
5+8 means multiplying 5 times 8, getting 40, then adding 5, getting 45.
Edwin

Answer by ikleyn(52879) About Me  (Show Source):
You can put this solution on YOUR website!
.
My view on such problems is THIS: 

     Without appropriate explanations, it is the treatment "below the belt . . . ".


     And would my will for it, I'd momentarily redirect such posts to the TRASH section without any explanations.

For the sake of purity of this forum . . .