Please teach me how to find the greatest common divisor.

As the phrase 'If it does not sing, let's wait until the cuckoo sings' suggests, we should wait patiently until the opportunity comes.

He has done everything he can to prepare for the exam, and now he is in a state of 'doing all that is humanly possible and waiting for fate to take its course'.

He often takes things out of context, leading people to misunderstand.

He chose to discard the shadow for the substance.

For the sake of friendship, he chose to cut off his own interests and take righteousness.

Please calculate the quartiles of this data set.

He started a business without a plan, forgetting the lesson of 'peach and chestnut seeds take three years to bear fruit, persimmons eight years.'