4th Class Mental Ability Days and Dates & Possible Combinations Days and Dates & Possible Combinations

Possible Combinations

• How to make possible combinations/pairs of 1 - 1 objects from given \[m-n\] objects?
•  If \[m=n,\] then number of possible (1 - 1) combinations of (m - n) objects are\[m\times m\].
•  If \[m~\cancel{=}\,n,\]then number of possible (1 - 1) combinations of (m - n) objects are\[m~\times \,n\].                                            

Days and Dates

• How to find the days required in question?
• We have to first naming what is today, yesterday and tomorrow.
• 8th day from today is again that day. 

EXAMPLE

1.         If tomorrow will be Tuesday, then what was day before yesterday?

             (a) Sunday                                             (b) Saturday                  

              (c) Monday                                            (d) Friday

Explanation: (b)