Giving a gift to a Quran teacher

Can a gift not be given away or sold?

Her mother gave her brother a gift to the exclusion of his siblings. Is this gift permissible?

Does a mother have to be fair in giving gifts to her children?

His father gave him more than he gave to him; is this regarded as riba?

Is it permissible to accept a gift from a man who deals in riba?

Accepting a gift with strings attached from a non-Muslim

Buying back a gift from someone other than the one to whom it was given

Can a Muslim accept a gift from his kaafir brother?

Buying back a gift from the one to whom it was given