Source: Official Guide
The weights of four packages are 1, 3, 5, and 7 pounds, respectively. Which of the following CANNOT be the total weight, in pounds, of any combination of the packages?
A. 9
B. 10
C. 12
D. 13
E. 14
The OA is E.
The weights of four packages are 1, 3, 5, and 7pounds,
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Hi All,
We're told that the weights of four packages are 1, 3, 5, and 7 pounds, respectively. We're asked which of the following CANNOT be the total weight, in pounds, of ANY combination of the packages. This question comes down to basic Arithmetic - and you might find that it's easiest to just 'brute force' the solution (meaning that you should try to add together various combinations of those 4 numbers to get the 4 totals that ARE possible).
Answer A: 9 pounds --> 1 + 3 + 5
Answer B: 10 pounds --> 3 + 7
Answer C: 12 pounds --> 5 + 7
Answer D: 13 pounds --> 1 + 5 + 7
There's only one answer remaining...
Final Answer: E
GMAT assassins aren't born, they're made,
Rich
We're told that the weights of four packages are 1, 3, 5, and 7 pounds, respectively. We're asked which of the following CANNOT be the total weight, in pounds, of ANY combination of the packages. This question comes down to basic Arithmetic - and you might find that it's easiest to just 'brute force' the solution (meaning that you should try to add together various combinations of those 4 numbers to get the 4 totals that ARE possible).
Answer A: 9 pounds --> 1 + 3 + 5
Answer B: 10 pounds --> 3 + 7
Answer C: 12 pounds --> 5 + 7
Answer D: 13 pounds --> 1 + 5 + 7
There's only one answer remaining...
Final Answer: E
GMAT assassins aren't born, they're made,
Rich
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Let's examine each answer choice:BTGmoderatorLU wrote:Source: Official Guide
The weights of four packages are 1, 3, 5, and 7 pounds, respectively. Which of the following CANNOT be the total weight, in pounds, of any combination of the packages?
A. 9
B. 10
C. 12
D. 13
E. 14
A) 9
1 + 3 + 5 = 9
B) 10
3 + 7 = 10
C) 12
5 + 7 = 12
D) 13
1 + 5 + 7 = 13
Since we eliminated every other choice, we know at this point that the answer is E. However, let's evaluate answer choice E for practice:
E) 14
We can see that 1 + 5 + 7 = 13 and 3 + 5 + 7 = 15, so it can't be 14.
Answer: E
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