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A is 8 times older to B

Does this mean (a) A's age = 8 * B's age or (b) A's age = A's age = 8 * B's age + B's age?

Similarly what is the meaning of A is 8 times older than B?

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It's not really correct to say A is 8 times older than B, because that would imply that being older has a distinct value that can be multiplied by 8. That is why it's hard to understand what it means.

Mathematically speaking, to say that A is 8 times older requires you first to decide how much older one unit is. In other words:

C is 6 months older than B.
A is 8 times older than B, than C is.
Therefore A is 4 years older than B.

But this is an English forum, not a Maths forum.

So the best thing to say is: A is 8 times as old as B.
Then it's obvious that A's age = 8 * B's age.

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  • Yes, it's only slightly more meaningful than saying that A's body temperature is twice what B's is.
    – Hot Licks
    Aug 21, 2015 at 2:05
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Your sentence is wrong. The correct version is,

A is 8 times older than B.

It means,

A's age = 8 * B's age.

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