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** and ++

Math brain teasers require computations to solve.

 

Puzzle ID:#30302
Fun:*** (2.33)
Difficulty:*** (2.73)
Category:Math
Submitted By:mercenary007*jm***

 

 

 



If 3**5 = 27 but 5**3 = 35

4++8 = 20 but 8++4 = 16

Then what is the result of (8**7)++9?

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Comments

terrique*jm
May 06, 2006

i am first to add a comment mercenary!!! anyways love this teaser was challenging and dealt with numbers... but i didnt get it maybe next time
cms271828
May 06, 2006

I got it without looking at the answer!!
Basically I was looking for a 9 to make 3 * 9 =27, so I tried adding 4 to the last number, and this worked for the other ** too.

Its slightly different for the ++, it only seems to work if you add the second number on again.

Good puzzle
blaghau
May 11, 2006

To paraphrase Ford Prefect, I didn't stand a whelks chance in a supernova
goblu91in*
Jun 02, 2006

Got it without even looking at the answer !!!

Cool one and keep them coming !!

Urs lovingly !

global
mmmcla01A*
Jun 28, 2006

I got the rule for the ++, but I couldn't figure out the one for **. I realized that 3*9 was 27, but I never thought to add four to the five...oh, well...maybe next time!

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