Surah 4:11
"God charges you concerning your children: to the male, a share equal to two females. But if they be (only) women, more than two, then to them two-thirds of what he leaves. But if there be (only) one, then to her a half. And to his parents, to each of them, a sixth of what he leaves, if he has children. But if he has no children, and his heirs are his parents, then to his mother a third. And if he has brothers, then to his mother the sixth, after any bequest he may have made or any debt (has been paid). Whether your fathers or your sons are of most benefit to you, you do not know. (This is) an obligation from God. Surely God is knowing, wise."
Mathematical Error in Hereditary Laws
The Qur'an prescribes specific fractions of an estate to be given to various heirs (e.g., daughters, parents, spouses). However, in certain family scenarios, the mandated fractions sum to more than 1 (or 100%), resulting in a mathematical impossibility. For example, if a man dies leaving a wife, three daughters, and two parents, the wife gets 1/8, daughters get 2/3, and parents get 1/6 each (totaling 1/3). 1/8 + 2/3 + 1/3 = 27/24, which is greater than the total estate.