Weird Calculator Puzzles
You own a weird calculator with only 4 buttons, which perform the following 4 operations: 
. Your challenge is to add 1 to the numbers below by only pushing these buttons. For example, 18 → 19 with 2 buttons has solution: .
| A. 3 → 4 with 3 buttons
| B. 10 → 11 with 3 buttons
| C. 22 → 23 with 3 buttons
|
| D. 23 → 24 with 3 buttons
| E. 29 → 30 with 3 buttons
| F. 36 → 37 with 3 buttons
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| G. 12 → 13 with 4 buttons
| H. 17 → 18 with 4 buttons
| I. 19 → 20 with 4 buttons
|
| J. 24 → 25 with 4 buttons
| K. 34 → 35 with 4 buttons
| L. 54 → 55 with 4 buttons
|
| M. 4 → 5 with 5 buttons
| N. 7 → 8 with 5 buttons
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| O. 20 → 21 with 5 buttons
| P. 30 → 31 with 5 buttons
|
| Q. 26 → 27 with 6 buttons
| R. 39 → 40 with 6 buttons
|
| S. 64 → 65 with 6 buttons
| T. 70 → 71 with 6 buttons
|
The answers are here.