P245 数学题请教

zww8169

if the integer p leaves a remainder of 4 when divided by 9, all of the following must be true Except1. the number that is 4  less than p is a multiple of 9
2.the number that is 5 more  than p is a multiple of 9
3. the number that is 2 more than p is a multiple of 3
4. when divided by 3, p will leave a remainder of 1
5, when divided by 2, p will leave a remainder of 1

sdcar2010

5 is the answer.

The easiest way is to try REAL numbers which meet the restraints in the problem:
4, 13, 22, etc.

Use one of these numbers and perform the operation 1) through 5).

When it is either 4 or 22, 5) is wrong.