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प्रश्न
Find the unit digit of expanded form.
2921
बेरीज
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उत्तर
2921
Unit digit of base 29 is 9 and power is 21 ...(odd power).
Therefore, unit digit of 2921 is 9.
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Unit Digit of Numbers in Exponential Form
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When the unit digit of the base and its expanded form of that number is 9, then the exponent must be ____________ power.
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