how to find the unit digit of the cube of 21
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unit digit of cube 21 is 1
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unit digits of 21 = 1(....1)
the cube which is less than 21
2³<21<3³
2 is the smallest number whose cube is less than 21(.....2)
so perfect cube of 21 is 2
the cube which is less than 21
2³<21<3³
2 is the smallest number whose cube is less than 21(.....2)
so perfect cube of 21 is 2
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