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  • Question
  • (51+ 52 + 53 + ... + 100) =?


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

  • Correct Answer
  • 3775 

    Explanation
    This is an A.P. in which a = 51, l = 100 and n = 50.

    ∴Sum = n (a + l) = 50 x (51 + 100)   = (25 x 151)   = 3775.
    2 2

  • Numbers problems


    Search Results


    • 1. 587 x 999 =?

    • Options
    • A. 586413
    • B. 587523
    • C. 614823
    • D. 615173
    • Discuss
    • 2. (112 x 54) =?

    • Options
    • A. 67000
    • B. 70000
    • C. 76500
    • D. 77200
    • Discuss
    • 3. 106 x 106 - 94 x 94 =?

    • Options
    • A. 2400
    • B. 2000
    • C. 1904
    • D. 1906
    • E. None of these
    • Discuss
    • 4. (1000)9? 1024 =?

    • Options
    • A. 10000
    • B. 1000
    • C. 100
    • D. 10
    • E. None of these
    • Discuss
    • 5. What is the unit digit in 7105?

    • Options
    • A. 1
    • B. 5
    • C. 7
    • D. 9
    • Discuss
    • 6. What is the unit digit in(795 - 358)?

    • Options
    • A. 0
    • B. 4
    • C. 6
    • D. 7
    • Discuss
    • 7. The smallest 5 digit number exactly divisible by 41 is:

    • Options
    • A. 1004
    • B. 10004
    • C. 10045
    • D. 10025
    • E. None of these
    • Discuss
    • 8. 4500 x? = 3375

    • Options
    • A. 25
    • B. 34
    • C. 14
    • D. 35
    • E. None of these
    • Discuss
    • 9. What value should come in place of the question mark(?) in the following question? (?) + 3699 + 1985 - 2047 = 31111

    • Options
    • A. 34748
    • B. 27474
    • C. 30154
    • D. 27574
    • E. None of these
    • Discuss
    • 10. 72519 x 9999 =?

    • Options
    • A. 725117481
    • B. 674217481
    • C. 685126481
    • D. 696217481
    • E. None of these
    • Discuss


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