Question

the sum of the one eighth ,one twentieth parts is 31 ,find the number

Answer 1

Let the no. be x.

1/18part =x/18.

1/29part =x/20.

ATQ, x/18+x/20=31.

or 10x+9x/180=31.

or 19x /180=31

or x =31×180/19

Therefore x =620