Sometimes you just need a little helping hand with those pesky Number Cross calculations, right? We're here to help! Enter all the numbers from the row or column you're having trouble with, along with the target sum, hit Go, and you'll get a list of all the possible sums. You'll also see any digits that cannot be used to reach the target sum, and any that must be used as part of the sum. If you have numbers in your row or column that you have already determined must be part of the sum, check the Required box underneath them; this will narrow the Possible Combinations to only those that include those digits. Take care with the Impossible and Required digits though – if they appear more than once in your column or row, you'll need to work out which to eliminate and which to keep!
If you don't know why this calculator is useful, be sure to have a look at our Number Cross tutorial.
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