Question 1113857
The problem is, some of the people that write the problems don't know what they're talking about.
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1 time older = a 100% increase = 2x as old, etc.
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PS  there is no "3 times younger" since 1 time younger = zero.
Same for 3 times smaller, 10 times closer, etc.
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If the stated problem is faulty, it's not up to us or others to try to figure out what the author might have meant.