Math topic中文

Common remainder problems (wu bu zhi shu)

Solve problems that give several divisor-remainder conditions by sieving candidates step by step (Sunzi style).

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Congruence and remainder properties

Practice questions

1The number $N$ is a two-digit number. • When $N$ is divided by $9$ , the remainder is $1$ . • When $N$ is divided by $10$ ,…
2How many positive three-digit integers have a remainder of $2$ when divided by $6$ , a remainder of $5$ when divided by $9$ …