1. 10 2. 9 3. 7 4. 8
Hi, I feel That the answer should be 9. 2*2+1=5, 5*2-1=9, 9*2+1=19, 19*2-1=37 and 37*2+1=75 So the answer will ne 9. Thankyou
9 anser
Ustd6