You have a calculator with 4 buttons: [x2], [+5], [/3], [-7]. If you start with the number 6, what do you need to click to get 1?

Answer 1

6x2=12

12x2 = 24

24/3 = 8

8-7 = 1

Answer 2

Hopefully not all the buttons need to be used and you can use them more than once?

6[x2]=12

12[/3]=4

4[+5]=9

9[/3]=3

3[/3]=1