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08 May 2018, 00:17
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C
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
15%
(low)
Question Stats:
81% (01:06) correct
19%
(01:45)
wrong
based on 103
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By how many years is Jason older than Allison?
(1) Jason is 6 years older than twice David’s age.
(2) In 8 years, Allison will be twice as old as David is now.
(1) Jason is 6 years older than twice David’s age.
(2) In 8 years, Allison will be twice as old as David is now.
08 May 2018, 00:34
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Solution
To find:
• By how many years Jason is older than Alison
Analysing Statement 1
• As per the information given in Statement 1, Jason is 6 years older than twice David’s age
- o From this statement, we cannot find out any information about Alison’s age
Analysing Statement 2
• As per the information given in Statement 2, Allison will be twice as old as David is now in 8 years
- o From this statement, we cannot find out any information about Jason’s age
Combining Both Statements
Combining the information from both the statements, we can say
• Jason is 6 years older than twice David’s age
• Also, Allison will be twice as old as David is now in 8 years
- o If we assume the age of David as d years, then we can say Jason’s present age is (2d + 6) years
- o Also, Alison’s present age = (2d – 8) years
Hence, the correct answer is Option C.
Answer: C
27 Nov 2019, 07:30
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Bunuel
By how many years is Jason older than Allison?
(1) Jason is 6 years older than twice David’s age.
(2) In 8 years, Allison will be twice as old as David is now.
(1) Jason is 6 years older than twice David’s age.
(2) In 8 years, Allison will be twice as old as David is now.
Target question: By how many years is Jason older than Allison?
Statement 1: Jason is 6 years older than twice David’s age.
Since we have no information about Allison, there was no way we can answer the target question.
Since we cannot answer the target question with certainty, statement 1 is NOT SUFFICIENT
Statement 2: In 8 years, Allison will be twice as old as David is now.
Since we have no information about Jason, there was no way we can answer the target question.
Since we cannot answer the target question with certainty, statement 2 is NOT SUFFICIENT
Statements 1 and 2 combined
Let J = Jason's PRESENT age
Let D = David's PRESENT age
Let A = Allison's PRESENT age
From statement 1, we can write: J = 2D + 6
From statement 2, we can write: A + 8 = 2D
Take the top equation and replace 2D with A + 8 to get: J = (A + 8 ) + 6
Simplify: J = A + 14
This tells us that J is 14 greater than A
In other words, Jason is 14 years older than Allison
Since we can answer the target question with certainty, the combined statements are SUFFICIENT
Answer: C
Cheers,
Brent
