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  • Question
  • The last two digits of 2151415 ?


  • Options
  • A. 81
  • B. 61
  • C. 91
  • D. 51

  • Correct Answer
  • 51 

    Explanation

    Unit digit of this expression is always 1 as the base ends with 1. 

    For the tenth place digit we need to multiply the digit in the tenth place of the base and unit digit of the power and take its unit digit.

    i.e, tenth place digit in 2151 is 5 and

    tenth place digit in power 415 is 1

    And the units digit in the product of 5 x 1 = 5

     

    Therefore, last two digits of  2151 415  is 51.

  • Tags: AIEEE, Bank Exams, CAT, GATE, Bank Clerk, Bank PO

    More questions

    • 1. 
      NA

    • Options
    • A. 215
    • B. 143
    • C. 247
    • D. 91
    • Discuss
    • 2. 
      2 : 32 :: 3 :?

    • Options
    • A. 243
    • B. 293
    • C. 183
    • D. 143
    • Discuss
    • 3. What is always in worry?

    • Options
    • A. Difficulty
    • B. Unrest
    • C. Non-Cooperation
    • D. Poignancy
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    • 4. What is found necessarily in milk?

    • Options
    • A. Cream
    • B. Curd
    • C. Water
    • D. Whiteness
    • Discuss
    • 5. 
      Statement:
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      Assumptions:
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      II. The security guard posted at the gate may be able to stop the sales persons entering the society

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    • B. if only assumption II is implicit
    • C. if either I or II is implicit
    • D. if neither I nor II are implicit
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    • 6. 
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    • Options
    • A. bgtbt
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    • C. atbbt
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    • 7. 
      On which of the following floors does B live?

    • Options
    • A. Sixth
    • B. Fourth
    • C. Second
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    • 8. 
      Frankness : Blunt

    • Options
    • A. Rise : Awake
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    • C. Sickness : Death
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    • Options
    • A. abbba
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    • 10. 
      Kathak : Bharatnatyam : Odissi

    • Options
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