** and ++
Math brain teasers require computations to solve.
If 3**5 = 27 but 5**3 = 35
4++8 = 20 but 8++4 = 16
Then what is the result of (8**7)++9?
Answer
The result is 106.
For the operator **, you add 4 to the second number and then multiply, so a**b = a * (b + 4)
and a++b = a + (b * 2)
So therefore (8**7) ++9 = (8*(7 + 4)) ++ 9
= 88++9
= 88 + (9 *2)
= 88 + 18
= 106
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Comments
terrique  
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 |
blagh
May 11, 2006
| To paraphrase Ford Prefect, I didn't stand a whelks chance in a supernova |
goblu91 
Jun 02, 2006
| Got it without even looking at the answer !!!
Cool one and keep them coming !!
Urs lovingly !
global |
mmmcla01  
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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