What is in seasons, seconds, centuries and minutes but not in decades, years or days?

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

Two in a corner, one in a room, zero in a house, but one in a shelter. What am I?

Take away the whole and some still remain. What is it?

How many times do a clock's hands overlap in a day ?

Can you spot the man between the coffee bean in the picture below ?

Can you make the below equation true by using any three numbers from "1, 3, 5, 7, 9, 11, 13 and 15"?

( ) + ( ) + ( ) = 30

Jack and Joseph are well-known golf rivals. One Day during a match, they were level at a score of 30. Jack hit a bad shot and Joseph added 10 to his score. Joseph then hit an awesome shot and he won the game.

How ?

Can you place six X (crosses) in below board without making three in a row in any way ?

There are people and strange monkeys on this island, and you can not tell who is who (Edit: until you understand what they said - see below). They speak either only the truth or only lies.
Who are the following two guys?
A: B is a lying monkey. I am human.
B: A is telling the truth.