The age difference between Beth and her sister is 18 - 5 = <<18-5=13>>13 years.

Beth must be 13 x 2 = <<13*2=26>>26 to be twice her sister's age.

Beth will be twice her sister's age in 26 - 18 = <<26-18=8>>8 years.

# Answer

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Question:
If Beth is 18 years old and her little sister is 5, in how many years would she be twice her sister's age?
Answer:
Let's think step by step.

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8
If Beth is 18 years old and her little sister is 5, in how many years would she be twice her sister's age?
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