A series is given with one term missing. Select the correct alternative from the given ones that will complete the series.
11, 36, 147, ?, 1779, 5340, 21363
Show answer & explanation
Correct answer: B
Explanation
Series: 11, 36, 147, ?, 1779, 5340, 21363
11×3+3=36
36×4+3=147
Rule:
Next number = Previous number × (3, 4, 3, 4…) + 3
147×3+3=444
444×4+3=1779
1779×3+3=5340
5340×4+3=21363
So the missing number:
147×3+3=444
Correct answer: 2) 444