Question : The sum of three consecutive natural numbers, each divisible by 5, is 225. The largest of them is:
Option 1: 85
Option 2: 75
Option 3: 70
Option 4: 80
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Correct Answer: 80
Solution : Given: The sum of three consecutive natural numbers, each divisible by 5, is 225. Let the numbers be $5x, 5x + 5, 5x + 10$. So, $5x + 5x + 5 + 5x + 10 = 225$ ⇒ $15x + 15 = 225$ ⇒ $15x = 210$ $\therefore x = 14$ Largest number $= (5x+10) = 70 + 10 = 80$ Hence, the correct answer is 80.
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