I used to have the same problem.

First you should know this will start working after some time.

try to find out if you study math correctly.

answer math questions at home and see how many of them are right.

If you checked them and found out that most of them are right but you still don't get good scores,don't worry.

find more difficault questions and see if you can answer them right.

if they were answered right too try to change your book again,

do this until you find the perfect questions.

I don't know why they teach us arabic in Iran!!!

our language is totally different from arabic and it is very hard for people like me who never get along with these things!

Yes,but I take a shower every day!

but for the days I get a haircut I don't take a shower in the morning,I take a shower after I get my haircut.

I think it was a good idea to call the police,

In my country the currency is toman.

each 1000 tomans=$1

I have 10 gold coins each worth 315,000tomans=$315

I bought them with my bank money and got some for my birthday.

10x315=$3150

And $4000 in my bank account.

I have $7150 credit.

Is it good for a 16 years old boy?