In-a-set-of-3-consecutive-natural-numbers-the-sum-of-the-last-2-numbers-is-equal-to-3-times-the-first-numbers-Find-the-sum-of-all-the-three-numbers-

Question Number 95986 by mpym last updated on 29/May/20

In a set of 3 consecutive natural numbers

the sum of the last 2 numbers is equal

to 3 times the first numbers . Find the

sum of all the three numbers .

Commented by mr W last updated on 29/May/20

n - 1, n, n + 1

n + (n + 1) = 3 (n - 1)

\Rightarrow n = 4

Σ = 3 + 4 + 5 = 12

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