1) Four years ago, Alyssa was twice as old as Clara is now

2) Alyssa is 8 years older than Clara

The OA is A

**Source: Veritas Prep**

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**A**

**B**

**C**

**D**

**E**

If Alyssa is twice as old as Brandon, by how many years is Brandon older than Clara?

1) Four years ago, Alyssa was twice as old as Clara is now

2) Alyssa is 8 years older than Clara

The OA is A

**Source: Veritas Prep**

1) Four years ago, Alyssa was twice as old as Clara is now

2) Alyssa is 8 years older than Clara

The OA is A

- Ian Stewart
- GMAT Instructor
**Posts:**2612**Joined:**02 Jun 2008**Location:**Toronto**Thanked**: 1090 times**Followed by:**355 members**GMAT Score:**780

00:00

**A**

**B**

**C**

**D**

**E**

Using Statement 1 alone, we know if we double Brandon's age and double Carla's age, we get two numbers that are 4 apart. When you double two positive numbers, you double their difference, so Brandon's age and Carla's age must be 2 apart, and Statement 1 is sufficient alone. Or you could see that algebraically, by subtracting the second equation below from the first:

2B = A

2C = A - 4

to get:

2B - 2C = 4

B - C = 2

Statement 2 is not sufficient, as any two numerical examples will show, so the answer is A.

2B = A

2C = A - 4

to get:

2B - 2C = 4

B - C = 2

Statement 2 is not sufficient, as any two numerical examples will show, so the answer is A.

If you are looking for online GMAT math tutoring, or if you are interested in buying my advanced Quant books and problem sets, please contact me at ianstewartgmat at gmail.com