Brain Teasers
** and ++
If 3**5 = 27 but 5**3 = 35
4++8 = 20 but 8++4 = 16
Then what is the result of (8**7)++9?
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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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
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
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
To paraphrase Ford Prefect, I didn't stand a whelks chance in a supernova
Got it without even looking at the answer !!!
Cool one and keep them coming !!
Urs lovingly !
global
Cool one and keep them coming !!
Urs lovingly !
global
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!
This puzzle is flawed as it has two possible answers.
Based off the clues provided, you could rationalize that with the double symbols you just need to add 4 to the second digit. So it could read as follows...
If...3*(5+4) = 27 but 5*(3+4) = 35
And...4 + (8+4) = 20 but 8 + (4+4) = 16
Then what is the result of (8**7)++9?
Answer: (8*(7+4)) + (9+4) = (8*11) + (13) = 88+13 = 101
Based off the clues provided, you could rationalize that with the double symbols you just need to add 4 to the second digit. So it could read as follows...
If...3*(5+4) = 27 but 5*(3+4) = 35
And...4 + (8+4) = 20 but 8 + (4+4) = 16
Then what is the result of (8**7)++9?
Answer: (8*(7+4)) + (9+4) = (8*11) + (13) = 88+13 = 101
Disregard my previous comment. My calc was wrong Good brain teaser!
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