$4427, 827, 67, 31, 9, ?$
- (a): $7$
- (b): $6$
- (c): $5$
- (d): $4$
Looking at the numbers I think that there must be some exponential relationship but couldn't find it. I took the sequence of differences between the numbers which is $3600, 760, 36, 22, ?$
But I still couldn't find any relationship.
I do not think the question is wrong.
Source : NTSE Test Series, MAT