What is so fragile that saying its name breaks it?

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

Which tank will fill first?

Do you know who was buried in John's tomb?

Begin with a word, five letters to my name,
Remove the first and last but I am the same
Take out my middle and still, I remain.
What word am I?

Can you convert the number zero(0) into a positive number using just one mathematical operator ?

Can you find the next number in the below sequence
3 , 7 , 10 , 11 , 12 , 17 ?

You are playing as white and given four rooks to checkmate the black king in four moves with the following rules 1. You can place one rook every move and ensure the black king should be in check position.2. After four moves the black king should be in the checkmate position.

What am I?

A few friends are enjoying their sea voyage in a boat full of apples. On the way, they felt hungry and thus decided to eat the apples. Together, they ate two dozen of apples. When they have eaten the apples, will there be any change in the water level?