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Question

52+102+152+...+1002= ___


A
67750
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B
8250
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C
17500
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D
71750
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Solution

The correct option is D 71750
52+102+152+...+1002=52(12+22+32+...+202)=52×20(20+1)(2(20)+1)6=25×172206=71750

Mathematics

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