the sum of three consecutive multiples of 7 is 405.find the multiples
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Sum of 3 consecutive multiples of 7 is 405
Let the consecutive multiple of 7 be
7n,(7n+7), (7n+14)
⇒ 7n+(7n+7)+(7n+14)=777
⇒ 21n+21=777
⇒ 21n=756 ⇒n=36
So No in 252, 259, 266
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