A boy is 3 years old. His sister is 3 times older. Sister’s age when boy is 11?
- 11
- 15
- 17
- 19
Explanation
Calculate Initial Age: The boy is 3 years old, and his sister is 3 times older.
This means she is 3 x 3 =9years old.
Find the Age Difference:
The constant age difference between them is 9-3 = 6 years.
Calculate Future Age: When the boy reaches 11 years old, the sister will still be 6 years older than him.
Final Result: 11 + 6 = 17
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