What should come in place of the question mark '?' in the following number series?
6000, ?, 3000, 4500, 9000, 22500
1
2000
2
1500
3
3500
4
3000
5
2500
What should come in place of the question mark '?' in the following number series?
6000, ?, 3000, 4500, 9000, 22500