sloved

Hello 
Hariprasad Gurav
question 
7716,2571,855,x,90,25
solution
7716/3=2572-1= 2571
2571/3= 857-2= 855
855/3= 285-3 =282
282/3= 94-4 = 90
90/3=30-5=25

thank you 
please comment and follow my blog

https://www.facebook.com/combinedgraduatelevelcgl