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AQuA-RAT train #56184 · Number Theory · Digits

How many 5 digit nos are there if the 2 leftmost digits…

How many 5 digit nos are there if the 2 leftmost digits are odd and the digit 4 can't appear more than once in the number ? Could someone please provide a solution using a approach other than ( 1-x(none)) approach?

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AQuA-RAT — Algebra Question Answering with Rationales (Ling et al., DeepMind, 2017) · train #56184

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