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  • Question
  • What will come in place of the question mark (?) in the following number series? 3240, 540, 108, 27, ?, 4.5


  • Options
  • A. 7
  • B. 10
  • C. 9
  • D. 8

  • Correct Answer


  • Explanation

    Ans. 
    540 = 3240/6
    108 = 540/5
    27 = 108/4
    ? = 27/3, i.e. ? = 9


  • Numbers problems


    Search Results


    • 1. About 4 out of 5 students are left handed. If there are totally 40 students in an class. How many would be left handed ?

    • Options
    • A. 40
    • B. 45
    • C. 32
    • D. 30
    • Discuss
    • 2. The difference of two numbers is 11 and (1/5)th of their sum is 9. The numbers are

    • Options
    • A. 31, 20
    • B. 30, 19
    • C. 29, 18
    • D. 28, 17
    • Discuss
    • 3. Find the next number in the series 3, 4, 5, 5, 12, 13, 7, 24, 25, 8, 15, ...

    • Options
    • A. 26
    • B. 16
    • C. 17
    • D. 18
    • Discuss
    • 4. At a dinner party every two guests used a bowl of rice between them, every three guests used a bowl of dal between them and every four used a bowl of meat between them. There were altogether 65 dishes. How many guests were present at the party ?

    • Options
    • A. 60
    • B. 74
    • C. 82
    • D. 58
    • Discuss
    • 5. If the number 517*324 is completely divisible by 3, then the smallest whole number in the place of * will be:

    • Options
    • A. 0 
    • B. 1
    • C. 2
    • D. None of these
    • Discuss
    • 6. The sum of three consecutive odd numbers is 93. What is the middle number?

    • Options
    • A. 31
    • B. 33
    • C. 29
    • D. 27
    • Discuss
    • 7. The angles of a quadrilateral are in the ratio of 2:4:7:5. The smallest angle of the quadrilateral is equal to the smallest angle of a triangle. One of the angles of the triangle is twice the smallest angle of the triangle. What is the second largest angle of the triangle ?

    • Options
    • A. 80 degrees
    • B. 60 degrees
    • C. 120 degrees
    • D. 40 degrees
    • Discuss
    • 8. If V = 12R / (r + R) , then R =

    • Options
    • A. Vr / (12 - V)
    • B. Vr + (V /12 )
    • C. V
    • D. V / (r - 12 )
    • Discuss
    • 9. If x is a whole number, then x²(x² - 1) is always divisible by ?

    • Options
    • A. 4
    • B. 8
    • C. 12
    • D. None
    • Discuss
    • 10. Find the number of factors of 9321 ?

    • Options
    • A. 4
    • B. 5
    • C. 7
    • D. 8
    • Discuss


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