Prove that for any natural numbes ending in 3,its square ends in 9.
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Step-by-step explanation:
Because any natural number with unit digit 3 is multiplied with 3 the unit digit in the result should be 9
For ex- 13*13=169
here in both the numbers the unit digit is 3
here in both the numbers the unit digit is 3therefore the unit digit in answer should be 9
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