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16 Feb 2026, 20:00
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E
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
75%
(hard)
Question Stats:
48% (01:31) correct
52%
(01:23)
wrong
based on 101
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A town had 10,000 residents, 8 years ago, and people have continued to move into the town ever since. If no one moved out or passed away during this period, how many new residents were born in the town during the same?
(1) A total of 5,000 people moved into the town over the last 8 years
(2) From new births alone, the population grew at a rate of 5 percent every 2 years.
(1) A total of 5,000 people moved into the town over the last 8 years
(2) From new births alone, the population grew at a rate of 5 percent every 2 years.
16 Feb 2026, 23:54
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Let us assume the current year is 2026 for clarity. According to the stem, the town’s population in 2018 was 10,000 residents.
We are asked to determine the number of newborns since 2018, given that no residents have moved away or died.
(1) This only entails info on the new comers to the town, and not about the new borns. Insufficient.
(2) This does not bifurcate as to how many were new comers. Insufficient.
Before proceeding, it is important to note that population growth is typically calculated using compound growth, not simple growth. (Unless stated otherwise specifically)
From (1) & (2), we do know the overall population excluding the new borns. However, we still cannot determine at what specific time did the new comers arrive to the town in order for us to calculate the rate at 5 percent every 2 years for the new borns.
For example, 5000 new comers could have arrived to the town in 2018, in the middle, in 2026, etc. at any given time. If we were to calculate our rate of growth as per each, we would get a different answer for every different scenario.
Hence, both of the statements even together are not sufficient. Option E.
We are asked to determine the number of newborns since 2018, given that no residents have moved away or died.
(1) This only entails info on the new comers to the town, and not about the new borns. Insufficient.
(2) This does not bifurcate as to how many were new comers. Insufficient.
Before proceeding, it is important to note that population growth is typically calculated using compound growth, not simple growth. (Unless stated otherwise specifically)
From (1) & (2), we do know the overall population excluding the new borns. However, we still cannot determine at what specific time did the new comers arrive to the town in order for us to calculate the rate at 5 percent every 2 years for the new borns.
For example, 5000 new comers could have arrived to the town in 2018, in the middle, in 2026, etc. at any given time. If we were to calculate our rate of growth as per each, we would get a different answer for every different scenario.
Hence, both of the statements even together are not sufficient. Option E.
ExpertsGlobal5
21 Feb 2026, 04:00
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Explanation:
8 years ago, the number of residents was 10000.
We need to find whether the “number of new residents that were born in the town during the last 8 years” can be determined.
Statement (1)
This statement gives the number of people (5000) that moved into the town during the last 8 years.
No information is provided regarding the birth rate in the town.
It is NOT possible to determine the exact number of new residents that were born in the town. Hence, Statement (1) is insufficient.
Statement (2)
This statement gives the birth rate (5% every 2 years) in the town.
No information is provided regarding the number of people that moved into the town during the last 8 years.
It is NOT possible to determine the exact number of new residents that were born in the town. Hence, Statement (2) is insufficient.
As Statement (1) alone as well as Statement (2) alone is insufficient to answer the question, we need to now combine the two statements.
Statement (1) and Statement (2) combined
The two statements combined provides no information regarding the time at which these 5000 people moved into the town.
If all 5000 people had moved in 6 years back, the number of births calculated using the birth rate would be higher compared to a scenario where these 5000 people had all moved in just 1 year ago.
It is NOT possible to determine the exact number of new residents that were born in the town. Hence, Statement (1) and Statement (2) combined are insufficient.
E is the correct answer choice.
