Correct Answer: (a) 9 - 44 - 218
Solution:तर्क:- (पहली संख्या × 5) + 1 = दूसरी संख्या, (दूसरी संख्या × 5) + 1 = तीसरी संख्या
6 - 31 - 156 :- (6 × 5) + 1 = 31, (31 × 5) + 1 = 156
13 - 66 - 331 :- (13 × 5) + 1 = 66 , (66 × 5) + 1 = 331
16 - 81 - 406 :- (16 × 5) + 1 = 81, (81 × 5) + 1 = 406
लेकिन, 9 - 44 - 218 :- (9 × 5) + 1 = 46 (44 नहीं), (44 × 5) + 1 = 221 (218 नहीं )