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数列与级数
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Quizzes in 数列与级数 for SSC
数学
算术与数系
计算从 15 到 25(含)所有整数的和。
200
220
240
210
Correct answer(s):
220
数学
算术与数系
求前 15 个自然数的和。
105
120
135
150
Correct answer(s):
120