• View Full Post

    Shortcut of Permutation-2

    Shortcut 95: Repeated elements      n!/(a!*b!) Question: In how many ways the letters of the word “ENVIRONMENT” can be arranged? Answer: n = 11 Let,...

    33
  • View Full Post

    Shortcut of Permutation-1

    Shortcut 91: Events   Dependent=multiplication   Independent =addition Question: There 3 busses from city A to city B and there are 5 busses from city...

    33
  • View Full Post

    Shortcut of Calendar and Clocks

    Shortcut 87:                              Using the odd days Question: Find the day of birth of MS Dhoni (7 July, 1981), if 31 Dec 1999 is Friday...

    39
  • View Full Post

    Shortcut of Heights and Distances

    Shortcut 85: Using tanƟ Ɵ                                tan 0                                    0 30                            45                                  1 60                             90                              Question:...

    41
  • View Full Post

    Shortcut of Number system

    Shortcut 77: Divisibility test Divisibleby                                    Rule 2                            Last digit of a number should be 0,2,4,6, or 8 3                            Sum of the digit should be divisible...

    33