The day after tomorrow will be three days before Tuesday. Can you find out what is today?

You may enter, but you may not come in. I have space, but no room. I have keys, but open no lock. What am I?

Look at the below sequence of letters and tell us what the next letter should be:

O T T F F S S ?

If Rajina's daughter is my daughter's mom, who am I to Rajina?

John, Jack and Jill are in a desert. John doesn't like Jill and hence decides to murder him. He poisons the water supply of Jill. Since it is a desert area, Jill must drink or he will die of thirst.

Jack does not know of the actions of John and also decides to murder Jill. To succeed in his ill motives, he removes the water supply of Jill so he dies of thirst.

Jill dies due to thirst. Who murdered Jill?

What brings you down but never up?

I have holes on the top and bottom. I have holes on my left and on my right. And I have holes in the middle, yet I still hold water. What am I?

Below, you can see some coding:
January = 1017
February = 628
March = 1335
April = 145
May = 1353
June = 1064
July = 1074
August = 186

Now deciphering the way it has been coded, can you find out how September will be coded?

There are 20 people in an empty, square room. Each person has full sight of the entire room and everyone in it without turning his head or body, or moving in any way (other than the eyes). Where can you place an apple so that all but one person can see it?

Rectify the following equality 101 - 102 = 1 by moving just one digit.