Select the number from among the given options that can replace the question mark (?) in the following series.
3, 20, 121, 604, 2417, ?
Options :
a) 7300
b) 7275
c) 7250
d) 7200
SSC CGL Exam Paper 2024 – General Intelligence and Reasoning
Solution:
The series: 3, 20, 121, 604, 2417, ?
Logic :
3 to 20: ->3 * 7 – 1 = 20
20 to 121: ->20 * 6 + 1 = 121
121 to 604: ->121 * 5 – 1 = 604
604 to 2417: ->604 * 4 + 1 = 2417
Continuing this pattern:
2417 to ?: 2417 * 3 – 1 = 7250
So, the next number in the series should be 7250.
Correct Answer : c) 7250