Identify the smallest 3 digit number that can formed using the digits 8, 5 and 1 by taking each digit once.

158

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185

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851

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None of the above

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Solution

The correct option is A 158
To form the smallest number (without repetition of digits) from the given digits, write the digits in ascending order.

1 < 5 < 8

Hence, the smallest 3 digit number using 8, 5 and 1 by taking each digit once is 158.

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