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Re: A sequence of numbers is given as: 1, 2, 2, 3, 3, 3, 4, 4, 4, 4 and so [#permalink]
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Here in our GRE math book all you need to know about https://gre.myprepclub.com/forum/how-to ... tml#p69536
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Re: A sequence of numbers is given as: 1, 2, 2, 3, 3, 3, 4, 4, 4, 4 and so [#permalink]
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Thanks the lovely person who give me kudos <3
Sum of number terms in list = 1+2+3+...
-> find the sum that equals 100
A. option A:
n=11, mean=12/2, sum=6*11=66
The 56th-66th is 11
B. option B:
n=12, mean=13/2, sum=6.5*12=...
(Try C or skip to larger gap as we now 66+12 <100)
...
D. option D:
(Solution 1)
n=14, mean=15/2, sum=7.5*14=105
The 105-13=92th-105th is 14th
OR
(Solution 2): you plus until value close to 100th
66+12=78
66+12+13=...
66+12+13+14=105
Option D

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Re: A sequence of numbers is given as: 1, 2, 2, 3, 3, 3, 4, 4, 4, 4 and so [#permalink]
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