The sum of three consecutive natural numbers each divisible

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The sum of three consecutive natural numbers each divisible by 5, is 225. The largest among them is

Let the required largest number be x.
According to the question,
x + x – 5 + x – 10 = 225
⇒ 3x – 15 = 225
⇒ 3x = 225 + 15 = 240

⇒ x =	240	= 80
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