Question

find 3 consecutive numbers is 21. Find the other numbers.

Answer 1

Answer:

Suppose the number x, x+1 and x+2.

Their sum = 21.

Hence,

x+x+1+x+2 = 21

3x+3 = 21

3(x+1) = 21

x+1 = $\frac{21}{3}$

x +1 = 7

x = 7-1

x = 6.

Hence, Numbers are 6,7 and 8.