Question by Summer Clouds - Discuss with MathYouLike

Summer Clouds

15/06/2017 at 17:09

Toal of \(1+2+3+...+100\) is:
A) 5050
B) 10100
C) 2525
D) 5000

List of answers

Thu Thảo 17/06/2017 at 21:47

\(\left(100+1\right)\cdot100:2=5050\)

Answer: A
Lê Quốc Trần Anh Coordinator 16/06/2017 at 08:18

The answer is A: 5050

- Total of \(1+2+3+...+100\) = \(\left(1+100\right)\cdot100:2\) = \(5050\)
Phan Thanh Tinh Coordinator 15/06/2017 at 18:17

\(1+2+3+..+99+100=\dfrac{100\times101}{2}=50\times101=5050\)

Hence,the answer is A

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