@tugce190333 Answer is 95. You multiply the previous number by 2 then +1 or add one. That's all. 5*2 plus 1. 11*2 plus1. 23*2 plus 1. So 47*2 plus 1=95
@baharkarakrt Going by the first example. 5*2=10. 3*2 = 6. Add up Gives you 16. Second example. 6*2=12. 4*2=8. 12+8= 20. So to solve the last equation. 8*2=16. 5*2=10. So 16+10= 26. So the answer to this is 26.
@Daffydre2 Screwdriver is better. And that's not even a knife that can hurt. You need a double edged knife and the one that can retract inside or you could hurt yourself with this.