railway RRB ALP (CBT 1 + CBT 2 + CBAT) Mock Test Series 2025 (New) Logical Reasoning Series Number Series
Which of the following numbers will replace the question mark (?) in the given series?
1, 5, 13, 29, 61, ?
1
131
2
253
3
128
4
125
Which of the following numbers will replace the question mark (?) in the given series?
1, 5, 13, 29, 61, ?