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avatar+337 

2+2=3

3+3=4

4+4=5

BUT....

5+5=10

10+10=20

SO...

what is 15+3?

 

P.S    I don't know myself

off-topic
 May 1, 2020
 #1
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Not sure but:

\(15+3=(3*5)+3\)

Given that \(3+3=4\) thus \(3=1\)

\(5+5=10\) thus \(5=5\)

Now substitute 

\(1*5+1=6\)

.
 May 1, 2020
 #2
avatar+337 
0

No... If 5 and 10 stay the same ... So does 15, and any other number that is not divisible by 5 becomes 1 so the answer is 16

TacoBell  May 2, 2020

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