Question

the sum of two consecutive numbers is one fifth of their difference then the least number is

Answer 1

Let the two consecutive no. be

x,x+1

so it is given that-

$x + x + 1 = \frac{1}{5} | x - (x + 1)| \\ (2x + 1)5 = | - 1| \\ 10x + 5 = 1 \\ 10x = - 4 \\ x = - 0.4 \\ x + 1 = 0.6$
so least no. is -0.4