show that 21n cannot end 0,2,4,6 and8
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hope it will help uu
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Vidushii11:
also its 21 is an odd number so it can never emd with 0.2.4.6.8
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It is form 2to10 and for ending
with Zero. A no. should have 2 and 5 as its factors
with Zero. A no. should have 2 and 5 as its factors
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