You can improve your memory by keeping away from sin because the bad
effects of sin result in a bad memory and the inability to retain
knowledge. As for being intelligent or smart, this is from Allah and Allah
gave each one of us certain abilities to do certain things.
Kindly refer to the following link(s):
https://islamqa.info/en/38594

https://islamqa.info/en/3328

https://www.youtube.com/watch?v=h491OQ1P2i8

sheikh,my question is dat actuallyits nt a question its smthng abt me actually my mind is very weak my IQ level is very low i dnt understand anythng quickly nd i am unable to calculations quick due to lack of intelligence in me many people mock at me i feel vry bad..i am in grt aniexty sheikh help me give me some tips to improve my intelligence..

Psychological and Social Problems | June 20, 2017 5:54 am
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I have a big problem,i am 36, alone, nobody, bird in cage, never got married, i live alone and have NOTHING in my house in Holland, only a benefit of 250e a month and that’s not even enough to buy something extra only food i study last three months Islam and praying and during also problems, thing destroys my jobask, stays this all my life with SEVERE torture what i am during?
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My complexion Isn’t much white and have nose a bit wide. Due to this people even my own parents point out this fault and so my relatives. So my question is Is this a test of me from Allah? Bcz i read on islamqa that Allah tests with different things