Question

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Find the sum of all the four digits number that can be formed with the digit 0, 1, 2, and 3.

Answer 1

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: The number of four digits number that can be formed using 0, 1, 2, 3 is 3 × 4× 4,× 4 = 192 .

when we add a these numbers , then the number of units = 192/4 (0+ 1+ 2+ 3) = 288 .

Number of tens = 288 , number of hundreds = 288

finally number of thousand = 192/3 ( 1+ 2+3) = 384.

Hence required sum = 384× 1000 + 288×100+ 288×10 + 288 = 415968 Answer ✔

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