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  • Question
  • What is the unit digit in 7105?


  • Options
  • A. 1
  • B. 5
  • C. 7
  • D. 9

  • Correct Answer


  • Explanation
    Unit digit in 7 105 = Unit digit in [ (7 4 ) 26 x 7 ]

    But, unit digit in (74)26 = 1

    ∴ Unit digit in 7105 = (1 x 7) = 7


  • Numbers problems


    Search Results


    • 1. In a division sum, the divisor is 10 times the quotient and 5 times the remainder. If the remainder is 46, what is the dividend?

    • Options
    • A. 4236
    • B. 4306
    • C. 4336
    • D. 5336
    • E. None of these
    • Discuss
    • 2. On dividing a number by 357, we get 39 as remainder. On dividing the same number 17, what will be the remainder?

    • Options
    • A. 0
    • B. 3
    • C. 5
    • D. 11
    • Discuss
    • 3. In a division sum, the remainder is 0. As student mistook the divisor by 12 instead of 21 and obtained 35 as quotient. What is the correct quotient?

    • Options
    • A. 0
    • B. 12
    • C. 13
    • D. 20
    • Discuss
    • 4. Which one of the following is a prime number?

    • Options
    • A. 161
    • B. 221
    • C. 373
    • D. 437
    • E. None of these
    • Discuss
    • 5. The largest 4 digit number exactly divisible by 88 is:

    • Options
    • A. 9944
    • B. 9768
    • C. 9988
    • D. 8888
    • E. None of these
    • Discuss
    • 6. (1000)9? 1024 =?

    • Options
    • A. 10000
    • B. 1000
    • C. 100
    • D. 10
    • E. None of these
    • Discuss
    • 7. 106 x 106 - 94 x 94 =?

    • Options
    • A. 2400
    • B. 2000
    • C. 1904
    • D. 1906
    • E. None of these
    • Discuss
    • 8. (112 x 54) =?

    • Options
    • A. 67000
    • B. 70000
    • C. 76500
    • D. 77200
    • Discuss
    • 9. 587 x 999 =?

    • Options
    • A. 586413
    • B. 587523
    • C. 614823
    • D. 615173
    • Discuss
    • 10. (51+ 52 + 53 + ... + 100) =?

    • Options
    • A. 2525
    • B. 2975
    • C. 3225
    • D. 3775
    • Discuss


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