Ali is twice as old as his youngest brother if the difference between their ages is 15 years. How old is his youngest brother?

🧠 Explanation:

Given: Ali = 2 × (youngest brother); difference = 15
Step 1: Let brother’s age = b
Step 2: Relation gives 2b − b = 15
Step 3: Solve b = 15
Check: Ali = 30; difference 30 − 15 = 15 (consistent)
Final Answer: 15