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If 'X' is twice as old as 'Y' and 'Y' is 10 years old, how old is 'X'?

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Question: If \'X\' is twice as old as \'Y\' and \'Y\' is 10 years old, how old is \'X\'?

Options:

  1. 10
  2. 20
  3. 15
  4. 25

Correct Answer: 20

Solution: 

\'X\' being twice as old as \'Y\' means \'X\' is 2 * 10 = 20 years old.

If 'X' is twice as old as 'Y' and 'Y' is 10 years old, how old is 'X'?

Practice Questions

Q1
If 'X' is twice as old as 'Y' and 'Y' is 10 years old, how old is 'X'?
  1. 10
  2. 20
  3. 15
  4. 25

Questions & Step-by-Step Solutions

If 'X' is twice as old as 'Y' and 'Y' is 10 years old, how old is 'X'?
  • Step 1: Identify the age of 'Y'. We know that 'Y' is 10 years old.
  • Step 2: Understand what it means for 'X' to be twice as old as 'Y'. This means we need to multiply 'Y's age by 2.
  • Step 3: Calculate 'X's age by multiplying 'Y's age (10) by 2. So, 2 * 10 = 20.
  • Step 4: Conclude that 'X' is 20 years old.
  • Age Relationships – Understanding how to calculate ages based on given relationships, such as one person being twice the age of another.
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