# A series of books were published at an interval of seven years. When the seventh book was published, the total sum of publication years was 13,524. The first book was published in

#### TCSSkillRack on 16-Mar-2016 11:36

A series of books were published at an interval of seven years. When the seventh book was published, the total sum of publication years was 13,524. The first book was published in
on 17-Mar-2016 17:12

1911
on 20-Mar-2016 13:00

1932
on 21-Mar-2016 13:41

on 27-Mar-2016 18:16

on 28-Mar-2016 15:13

Let the first year of publication be x, 7*x + 7*(1+2+3+4+5+6) = 13,524 7*x = 13377 x = 1911
on 28-Mar-2016 15:13

13524=(x-5)+(x-3)+(x-1)+x+(x-1)+(x+3)+(x+5) 13524=7x x=1932 the year of first series of book published is =(1932-5)=1927
on 2-Apr-2016 00:00

13524/7 = 1932 (1932+1939+1946+1953+1960+1969+1974)=13671. 13671-13524=147 So 147/7=21. So 1932-21=1911
on 21-Apr-2016 15:31

Let the year of publication be x so,x+(x+7)+x+(14).....=13671 7x+7+14+21+28+35+42=13671 x=1911
Solution:

Let the first year of publication be x, 7*x + 7*(1+2+3+4+5+6) = 13,524 7*x = 13377 x = 1911