Topic

等差数列

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Quizzes in 等差数列 for SSC

数学

在等差数列 5, 11, __, 23 中求缺项。

16
17
18
15

Correct answer(s):

17

数学算术与数系

求前 15 个自然数的和。

105
120
135
150

Correct answer(s):

120