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2 years, 7 months ago
2 years, 7 months ago
I wrote 7 , taking in to account only digits with 9 in middle
2 years, 7 months ago
I messed up this one too, but the answer is 70. z-x = 2, and since both z and x != 0, it makes z = 3,4,5,6,7,8,9. Edit : 70 because y can take 10 values for every z and x pair.
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