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If the unit digit in the product 75 ? x 49 x 867 x 943 be 1, then thevalue of ? is : |
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Answer» Answer: 9 Step-by-step explanation: first you have to multiply the UNIT digit of the THREE no. one by one like this 9×7=63 unit digit=3,3×3=9 we have to find by which NUMBER 9 is multiplied to get 1 and the answer is 9 |
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