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★★★★★
It tells me to update, but there is not an update when I check. I wish it eliminated "impossible in position" and "just plain impossible", like you have 4 numbers added to 30 in an L shape, and it includes 3 as a possibility because 9+9+9+3, but there is no possibility of three 9's.
★★★★★
Excellent tool... Does what it says. Indispensable for getting a list of possible numbers for a target number. The only small "complaint", and it really isn't a serious one, is that it is difficult to play a mathdoku game on my tablet, and use this calculator at the same time. I have to switch between them with pen and paper. But, on its own, this calculator is great.
★★☆☆☆
Crashes Can't clear an entry. Have to restart. Also defaults to 4 digits and when you try to switch, it crashes.
★★☆☆☆
Stops working If 10 or 20 are entered the app stops working. Otherwise, it would not be too bad. I have re-installed and will try again
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