789,645,545,481,440,429,425,............? a)645 b)545 c)481 d)440 e)429


Others by RANGEELA.D on 6-Aug-2016 16:19
789,645,545,481,440,429,425,............?
a)645 b)545 c)481 d)440 e)429
V SAI SREE on 17-Aug-2016 15:43Accepted Solution
if we check the difference between all the given numbers. it is as follows 144 , 100 , 64 , "41" , "11" ,4 hear we can see that the differences are the perfect squares.... so the answer i.e wrong number is 440. that should be replaced by 445 then 41 will be replaced by 36 & 11 by 16..
VIJAY LOGESH K on 22-Aug-2016 18:51
it is the form of square of even numbers (n<=12),and it is subtracted with previous number.So the the odd one is 440 because 481-64=445
Solution
if we check the difference between all the given numbers. it is as follows 144 , 100 , 64 , "41" , "11" ,4 hear we can see that the differences are the perfect squares.... so the answer i.e wrong number is 440. that should be replaced by 445 then 41 will be replaced by 36 & 11 by 16..