16Hit1600
AlgebraMediumAges from a ratio now and a difference later

Algebra practice question

Kai is twice as old as Lee. In 6 years, Kai will be 8 years older than Lee. How old is Kai now?

Answer: 16

k = 2l and (k + 6) = (l + 6) + 8 → k = l + 8. So 2l = l + 8 → l = 8 and k = 16.

Common wrong answers

If you answered 4
4 comes from 2l = 8, halving the difference.
If you answered 8
8 is Lee's age.
If you answered 22
22 is Kai's age in 6 years.

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