Re:Terms and Conditions Game
by gruez on Tuesday May 18, 2021 @11:35AM
(#27196078)
How do you solve question 8 aka "Untick all checkboxes to reject Terms and Conditions. When you tap on a checkbox, all the checkboxes change status apart from the one you tapped"?
[ Parent
| on HN ]
Memorize all starting ticked positions (there's only 4). Then simply tap those (and only those) positions one by one, you'll have everything unticked after you tap the last one.
Caveat:
Works if the number of starting ticks is even.
Proof:
Tapping does not change the state of the tapped checkbox, but flips all others.
There are only two states (ticked / unticked) => If a checkbox is flipped an even number of times, its final state is the same as its initial state. And if a checkbox is flipped an odd number of times, it's final state is the opposite of its initial state.
There are an even number of starting ticks (n = 4). So by tapping all starting ticked positions, we are flipping the rest an even number of times (n), and the starting ticked positions an odd number of times (n - 1).
Random flailing is pretty effective. You're looking for 1 state out of ~128 (I forgot how many check boxes there are), so a random walk will get you there before too long.
Re:Terms and Conditions Game
by PebblesRox on Tuesday May 18, 2021 @11:53AM
(#27196369)
Tap a space that's in the minority. It will reverse relative to the rest. So if there are more checks them empties, tap an empty. If there are more empties, tap a check.
Eventually you have all but one boxes checked. Tap the empty box and the checks will clear.