state gov UP Police Assistant Operator (Radio Cadre) Mock Test Logical Reasoning Series Number Series
Which number will replace the question mark (?) in the following series?
11, 15, 23, ?, 71, 135, 263, 519
1
39
2
43
3
27
4
57
Which number will replace the question mark (?) in the following series?
11, 15, 23, ?, 71, 135, 263, 519