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The easiest and fastest strategy on "Age" questions like this is "Working Backwards." Some instructors call it back-solving. In other words, it's best to start with the answer choices and see which one works. Do you have answer choices for this question? If so, I'll illustrate how to use the strategy. I think you'll find it's much more efficient than trying to set up an algebraic solution!

Re: The sum of Abbie's age and Iris's age is 42 years. 11 years
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24 Jul 2018, 19:47

Hello from the GMAT Club BumpBot!

Thanks to another GMAT Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).

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