Landscape vs Portrait

[Logan]

This is interesting. I assumed everyone picked up their calculators and used thumbs.

Just as a quick test, I tried entering:

sqrt(-ln(.5)/pi^2) * 30/1.25

And did it on the 42s in about 7 seconds after two attempts. After five attempts on the 15c (setting it down as Marcio and damaltor do), the best I had was about 9 seconds. Not a huge difference and definitely better than two-thumb but preferred the 42s in this particular case.