Find the number to replace the question mark in the series given below. 35, 25, 49, 35, 63, 45, ? , 55


HP by SkillRack on 17-Mar-2016 10:44
Find the number to replace the question mark in the series given below.

35, 25, 49, 35, 63, 45, ? , 55
P PRAVESH JAIN on 17-Mar-2016 11:46
77
KARTHIGEYAN G on 17-Mar-2016 14:56
77
dhanes on 17-Mar-2016 15:39
77
SIVARAMAKRISHNAN N on 17-Mar-2016 17:06
11*7=77
RAJAT SHARMA on 17-Mar-2016 17:25
77
AQUIB JAWED on 18-Mar-2016 00:01
81
madhumathi A on 18-Mar-2016 14:32
77
ilakkiya on 18-Mar-2016 15:45
7*11=77
ANKIT KUMAR CHANDRAKER on 18-Mar-2016 17:15
77
SHARMILA G on 18-Mar-2016 23:31
77
Sakthi Haritha S on 19-Mar-2016 12:44
77 first two nos difference is -10 second two pairs difference is -14.......hence...the last pair difference must be -22.... therefore the answer is 77
VETURI SAMEER on 20-Mar-2016 12:56
77 SECOND two number pair difference is 14.hence:63+14=77
KAVITHA V on 20-Mar-2016 16:45
77
Solution
35, 25, 49, 35, 63, 45, ? , 55

Odd position numbers are like 35,49,63,77,91 ... with a difference of 14.
Even position numbers are like 25,35,45,55,.. with a difference of 10.

Hence ?=63+14 = 77.