Question

I have a pen , now i have taken 2 pens from my friend . Then , my sister came and gave me 10 pen for my birthday . Now, my 12 friends taken one - one now , much pens i have ??

Answer 1

1+2+10-12=1
you again have only one pens...
so sad

Answer 2

1+2+10=13-12=1 you have only 1 pen