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  4. Quantitative Aptitude
  5. Number System and its Operations

Railways Quantitative Aptitude Number System and its Operations Sample Paper Number System Sample Test Paper-1

  • question_answer
    What is the digit in the hundred place in the product of first 45 even natural numbers

    A)  6                    

    B)  5       

    C)  4                    

    D)  0

    Correct Answer: D

    Solution :

    [d] We know that first 45 even numbers are 2, 4, 6, 8, 10, 12? 90 Product of these number is 2. 4. 6. 8. 10. 12 ??. 90 \[={{2}^{45}}\][1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11 ?? 45] \[={{2}^{45}}\][(5. 20). 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11  ?. 18. 19. 21. 22?.. 45] \[{{2}^{45}}\][(100). 1. 2. 3. 4. 6. 7?.. 18. 19. 21. 22?.45] Now the product will consist 0 at hundred place.


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