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akhil009 Group Title

what is the unit digit of product.....

  • one year ago
  • one year ago

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  1. akhil009 Group Title
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    |dw:1344435549985:dw|

    • one year ago
  2. telltoamit Group Title
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    second digit is 25?

    • one year ago
  3. akhil009 Group Title
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    2nd component is 251

    • one year ago
  4. akhil009 Group Title
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    \[3547^{153}*251^{72}\]

    • one year ago
  5. telltoamit Group Title
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    first digit: unit value changes like 7,9,3,1,7... first digit: unit value remains 1

    • one year ago
  6. akhil009 Group Title
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    can you pls elaborate it

    • one year ago
  7. telltoamit Group Title
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    7 into 7 = 49; 9 into 7 = 63; 3 into 7 = 21; 1 into 7 = 7

    • one year ago
  8. akhil009 Group Title
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    but ques is for 153 times also product of 251^72

    • one year ago
  9. telltoamit Group Title
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    so after every 4 times it repeats. as 152 is a multiple of 4, the reptition will happen till there on the 156rd multiplication , we ll get 7 again so 7 into 1 = 7 == ANSWER

    • one year ago
  10. telltoamit Group Title
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    gtg bye

    • one year ago
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