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  • Question
  • Maheshwari wants to buy 7 floors in an 68 storied building whose numbering stars from 1 upto 68. But she has to follow certain rules which are as follows : 1) None of the floor should be a prime number 2) None of the digit of the floor should be a prime number 3) Maheshwari cannot buy the 1st floor as it is being assigned to the architect. So how many options are left with Maheshwari to buy the floors ?


  • Options
  • A. 11
  • B. 17
  • C. 13
  • D. 19

  • Correct Answer
  • 17 

    Explanation

    Since floor starts form the 1 therefore 2 will be the 1st floor.
    Form 1 to 10 only 4,6,8,9,10 are not prime.
    Form 11 to 20 only 14 ,16,18 are not prime also non of their digits are prime.
    From 21 to 30 each number has a prime number so it must no be consider.
    In between 40 to 49 we have to consider only 40,44,46,48,49.
    50 to 59 follow either of the condition so we have too neglect it.
    In between 60 to 68 60,64,66,68.
    total option = 17.

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

    More questions

    • 1. 
      Find the present worth of a bill of Rs. 2420 due 2 years later at 10% compound interest. Also find the true discount?

    • Options
    • A. Rs. 2000, Rs. 420
    • B. Rs. 2200, Rs. 520
    • C. Rs. 2100, Rs. 460
    • D. None of these
    • Discuss
    • 2. In the following question, four groups of three numbers are given. In each group the second and third number are related to the first number by a Logic/Rule/Relation. Three are similar on basis of same Logic/Rule/Relation. Select the odd one out from the given alternatives.

    • Options
    • A. (9, 11, 14)
    • B. (13, 15, 18)
    • C. (17, 19, 22)
    • D. (21, 23, 28)
    • Discuss
    • 3. Find the odd word/letters/numbers pair from the given alternatives.

    • Options
    • A. 41 - 72
    • B. 12 - 30
    • C. 51 - 42
    • D. 11 - 20
    • Discuss
    • 4. Find the odd man out. 253, 136, 352, 324, 631, 244

    • Options
    • A. 324
    • B. 136
    • C. 352
    • D. 631
    • Discuss
    • 5. Select the odd word from the given alternatives.

    • Options
    • A. Stream
    • B. Rivulet
    • C. River
    • D. Valley
    • Discuss
    • 6. Select the odd word from the given alternatives.

    • Options
    • A. Chair
    • B. Sofa
    • C. Couch
    • D. Television
    • Discuss
    • 7. Find the odd number in the following number series? 24, 4, 13, 41, 151, 640

    • Options
    • A. 4
    • B. 640
    • C. 41
    • D. 13
    • Discuss
    • 8. Find the odd term from the given series of numbers ? 125, 127, 130, 135, 142, 153, 165 ?

    • Options
    • A. 153
    • B. 165
    • C. 142
    • D. 127
    • Discuss
    • 9. What comes next in this sequence 196, 169, 144, 121, 100, 81, ?

    • Options
    • A. 77
    • B. 74
    • C. 67
    • D. 64
    • Discuss
    • 10. Find out the odd word/letters/number/number pair from the given alternatives.

    • Options
    • A. LJH
    • B. XUS
    • C. VTR
    • D. FDB
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