Arithmetic Aptitudes › Problems on Ages › Question #4405
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QSam is twice as old as Mary, and Mary is half as old as John. If John is 40 years old, how old is Sam?

ID: #4405 Problems on Ages 327 views
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Problems on AgesTopic
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  • A 20 years ✔ ✖
  • B 35 years ✔ ✖
  • C 40 years ✔ ✖
  • D 45 years ✔ ✖
Correct Answer: Option C

Explanation

 Solution:

 Since Mary is half as old as John, she is 40 / 2 = <<40/2=20>>20 years old.
 Since Sam is twice as old as Mary,
 he is 2 * 20 = <<2*20=40>>40 years old.

 Therefore, Sam is 40 years old.

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