Home
Class 14
MATHS
A person starts typing the numbers from ...

A person starts typing the numbers from 1 to 1999. He press the keys total 'n' number of times. The value of n is L

A

6889

B

1000

C

2888

D

none of these

Text Solution

Verified by Experts

The correct Answer is:
A
Promotional Banner

Topper's Solved these Questions

  • MENSURATION

    QUANTUM CAT|Exercise QUESTION BANK|449 Videos
  • PERCENTAGES

    QUANTUM CAT|Exercise QUESTION BANK|271 Videos

Similar Questions

Explore conceptually related problems

The total number of m values for n = 4 is

The total number of possible values of magnetic quantum number for the value of l = 3 is

If the sum of first n natural numbers is (1)/(78) times the sum of their cubes, then the value of n is

A typist starts to type the serial numbers of candidates in a list, upto 500. Minimum how many times he has to press the keys of numerals only ?

If the sum of the first n natural numbers is 1/5 xx the sum of the their squares,the value of n is -

QUANTUM CAT-NUMBER SYSTEM-QUESTION BANK
  1. (392)^n-(392)^(n-1) is not divisible by :

    Text Solution

    |

  2. Mr. Chaalu while travelling by Ferry Queen has travelled the distance ...

    Text Solution

    |

  3. A person starts typing the numbers from 1 to 1999. He press the keys ...

    Text Solution

    |

  4. The remainder when (20)^(23) is divided by 17 is :

    Text Solution

    |

  5. Let p be a prime number such that 3 lt p lt 50, then p^2-1 is:

    Text Solution

    |

  6. If p be a prime number, then p^2 + 1 can not have its unit digit is :

    Text Solution

    |

  7. The number of numbers from 1 to 200 which are divisible by neither 3 n...

    Text Solution

    |

  8. P is a prime number and (p^2+3) is also a prime number. Find the numbe...

    Text Solution

    |

  9. In a bangle shop, the shopkeeper displays the bangles in the form of a...

    Text Solution

    |

  10. If a and b are two integers which are multiples of 5, which of the fol...

    Text Solution

    |

  11. What are the values of the digits a and b, respectively, in the number...

    Text Solution

    |

  12. A six digit number of the form abcabc is written where a, b, c in I^(+...

    Text Solution

    |

  13. Two numbers a and b are such that one is odd and the other is even. Wh...

    Text Solution

    |

  14. A gardner plants his garden with 5550 trees and arranged them so that ...

    Text Solution

    |

  15. The value of 'a' when 3^a = 9^b and 4^((a+b+2)b) = 16^(ab) is :

    Text Solution

    |

  16. The number of two digit prime number which remain prime even on invert...

    Text Solution

    |

  17. Half way through the journey from Delhi to Lahore Atalji began to look...

    Text Solution

    |

  18. Some times ago the height of my son 90 cm at the end of 1996. When I h...

    Text Solution

    |

  19. Chris windener had a servent who was determined to be paid $ 250, a wr...

    Text Solution

    |

  20. The sum of the squares of a two digit number is 10. If we add 18 to th...

    Text Solution

    |