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Ten years ago, the age of A was three times the age of B. If B is now 15 years o

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Question: Ten years ago, the age of A was three times the age of B. If B is now 15 years old, how old is A now?

Options:

  1. 25
  2. 30
  3. 35
  4. 40

Correct Answer: 30

Solution: 

Ten years ago, B was 15 - 10 = 5 years old. A was 3 * 5 = 15 years old then, so A is now 15 + 10 = 25.

Ten years ago, the age of A was three times the age of B. If B is now 15 years o

Practice Questions

Q1
Ten years ago, the age of A was three times the age of B. If B is now 15 years old, how old is A now?
  1. 25
  2. 30
  3. 35
  4. 40

Questions & Step-by-Step Solutions

Ten years ago, the age of A was three times the age of B. If B is now 15 years old, how old is A now?
Correct Answer: 25
  • Step 1: Determine B's current age, which is given as 15 years old.
  • Step 2: Calculate B's age 10 years ago by subtracting 10 from B's current age: 15 - 10 = 5 years old.
  • Step 3: According to the problem, 10 years ago, A's age was three times B's age. So, calculate A's age 10 years ago: 3 * 5 = 15 years old.
  • Step 4: Now, to find A's current age, add 10 years to A's age 10 years ago: 15 + 10 = 25 years old.
  • Age Relationships – Understanding how to calculate ages based on given relationships over time.
  • Basic Arithmetic – Applying addition and multiplication to solve age-related problems.
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