题目内容
The sum of n different positive integers is less than 50．The greatest possible value of n is（ ）
| A．10 | B．9 | C．8 | D．7 |
要使n的值最大即要求各数尽可能的小，
∵1+2+3+4+5+6+7+8+9=45，1+2+3+4+5+6+7+8+9+10=55，
∴n个不同的正整数和小于50，那么这个n的最大可能值为9．
故选B．
∵1+2+3+4+5+6+7+8+9=45，1+2+3+4+5+6+7+8+9+10=55，
∴n个不同的正整数和小于50，那么这个n的最大可能值为9．
故选B．
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