If the sum of the first 50 even numbers is 2,550, what is the sum of the first 50 odd numbers?
A. 1,275
B. 2,550
C. 2,500
D. 2,600
E. 3,000
==> You get 2+4+…..+98+100=2,550, then 1+3+….+97+99=?. If you compare each numbers, 1 is 1 less than 2, 3 is 1 less than 4, 97 is 1 less than 98, and 99 is 1 less than 100. Since there are 50 numbers in total, it is 50 less than 2,550.
Therefore, the answer is C.
Answer: C
A. 1,275
B. 2,550
C. 2,500
D. 2,600
E. 3,000
==> You get 2+4+…..+98+100=2,550, then 1+3+….+97+99=?. If you compare each numbers, 1 is 1 less than 2, 3 is 1 less than 4, 97 is 1 less than 98, and 99 is 1 less than 100. Since there are 50 numbers in total, it is 50 less than 2,550.
Therefore, the answer is C.
Answer: C
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