Charles’s and Sarah’s current ages are C years and S years, respectively.

BTGModeratorVI wrote: ↑

Fri Feb 28, 2020 10:02 am

Charles’s and Sarah’s current ages are C years and S years, respectively. If 6 years from now, Charles will be at least as old as Sarah was 2 years ago, which of the following must be true?

A. C + 6 < S − 2
B. C + 6 ≤ S + 2
C. C + 6 = S − 2
D. C + 6 > S − 2
E. C + 6 ≥ S − 2

Answer: E
Source: Kaplan

C + 6 = Charles' age 6 years from now
S - 2 = Sarah's age 2 years ago

We're told that Charles' age (in 6 years) is AT LEAST AS BIG as Sarah's age (2 years ago)
In other words, Charles' age (in 6 years) is GREATER THAN OR EQUAL TO Sarah's age (2 years ago)
We can write: C + 6 ≥ S − 2

Answer: E

Cheers,
Brent

BTGModeratorVI wrote: ↑

Fri Feb 28, 2020 10:02 am

Charles’s and Sarah’s current ages are C years and S years, respectively. If 6 years from now, Charles will be at least as old as Sarah was 2 years ago, which of the following must be true?

A. C + 6 < S − 2
B. C + 6 ≤ S + 2
C. C + 6 = S − 2
D. C + 6 > S − 2
E. C + 6 ≥ S − 2

Answer: E
Source: Kaplan

Six years from now, Charles will be C + 6 years old. Two years ago, Sarah was S - 2 years old. Finally, “at least as old as” means that the Charles’ age in 6 years may be equal to or greater than what Sarah’s age was 2 years ago. Thus, C + 6 ≥ S - 2.

Answer: E