Re: GRE Math Challenge #29-five consecutive integers is t
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23 Jul 2020, 16:52
Another option for solving for those of us who don't like algebra:
Pick easy numbers for the consecutive series, (I chose 1, 2, 3, 4, 5). Sum of all 5 will equal n*(n+1)/2 where n=5, so sum = 15, therefore t = 15.
Now check the answer choices to see which one gives you 5 as an answer. This is similar to asking: "Which of the following CAN be equal to 5 where t = 15?"
A) <0, cross it out
B) =1, cross it out
C) =3, cross it out
D) =5, this is the answer
if you want to check E for good measure...
E) =7, cross it out