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  3. The sum of the non-prime numbers between 40 and 50, non-inclusive, isA、131B、176

The sum of the non-prime numbers between 40 and 50, non-inclusive, isA、131B、176

游客2025-02-27  19
问题 The sum of the non-prime numbers between 40 and 50, non-inclusive, is
选项 A、131
B、176
C、274
D、405
E、495
答案 C
解析 The non-prime numbers between 40 and 50 are 42, 44, 45, 46, 48, and 49. (Remember, the non-inclusive means we don’t include the 40 and 50.) Add them all up and we get 274.
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